| cavity | | |
| n. (object) | 1. cavity, pit | a sizeable hole (usually in the ground).; "they dug a pit to bury the body" |
| ~ trou-de-loup | a sloping pit with a stake in the middle used as an obstacle to the enemy. |
| ~ barbecue pit | a pit where wood or charcoal is burned to make a bed of hot coals suitable for barbecuing meat. |
| ~ borrow pit | a pit created to provide earth that can be used as fill at another site. |
| ~ divot | (golf) the cavity left when a piece of turf is cut from the ground by the club head in making a stroke.; "it was a good drive but the ball ended up in a divot" |
| ~ fire pit | a pit whose floor is incandescent lava.; "the fire pit of the crater" |
| ~ hollow, hole | a depression hollowed out of solid matter. |
| ~ quicksand | a pit filled with loose wet sand into which objects are sucked down. |
| ~ sandpit | a large pit in sandy ground from which sand is dug. |
| ~ sawpit | a pit over which lumber is positioned to be sawed by two men with a long two-handed saw. |
| ~ tar pit | a natural accumulation of bitumens at the surface of the earth; often acts as a trap for animals whose bones are thus preserved. |
| n. (shape) | 2. cavity, enclosed space | space that is surrounded by something. |
| ~ space | an empty area (usually bounded in some way between things).; "the architect left space in front of the building"; "they stopped at an open space in the jungle"; "the space between his teeth" |
| ~ hollow | a cavity or space in something.; "hunger had caused the hollows in their cheeks" |
| ~ sac, pocket, pouch, sack | an enclosed space.; "the trapped miners found a pocket of air" |
| n. (process) | 3. caries, cavity, dental caries, tooth decay | soft decayed area in a tooth; progressive decay can lead to the death of a tooth. |
| ~ decay | the process of gradually becoming inferior. |
| n. (body) | 4. bodily cavity, cavity, cavum | (anatomy) a natural hollow or sinus within the body. |
| ~ blastocele, blastocoel, blastocoele, cleavage cavity, segmentation cavity | the fluid-filled cavity inside a blastula. |
| ~ archenteron | central cavity of the gastrula; becomes the intestinal or digestive cavity. |
| ~ body, organic structure, physical structure | the entire structure of an organism (an animal, plant, or human being).; "he felt as if his whole body were on fire" |
| ~ anatomical structure, bodily structure, body structure, complex body part, structure | a particular complex anatomical part of a living thing.; "he has good bone structure" |
| ~ sinus | any of various air-filled cavities especially in the bones of the skull. |
| ~ locule, loculus | a small cavity or space within an organ or in a plant or animal. |
| ~ lumen | a cavity or passage in a tubular organ.; "the lumen of the intestine" |
| ~ socket | a bony hollow into which a structure fits. |
| ~ pulp cavity | the central cavity of a tooth containing the pulp (including the root canal). |
| ~ cranial orbit, eye socket, orbital cavity, orbit | the bony cavity in the skull containing the eyeball. |
| ~ buccal cavity | the cavity between the jaws and the cheeks. |
| ~ antrum | a natural cavity or hollow in a bone. |
| ~ cloaca | (zoology) the cavity (in birds, reptiles, amphibians, most fish, and monotremes but not mammals) at the end of the digestive tract into which the intestinal, genital, and urinary tracts open. |
| ~ vestibule | any of various bodily cavities leading to another cavity (as of the ear or vagina). |
| ~ mediastinum | the part of the thoracic cavity between the lungs that contains the heart and aorta and esophagus and trachea and thymus. |
| ~ middle ear, tympanic cavity, tympanum | the main cavity of the ear; between the eardrum and the inner ear. |
| ~ pleural cavity | the cavity in the thorax that contains the lungs and heart. |
| ~ chamber | an enclosed volume in the body.; "the chambers of his heart were healthy" |
| ~ cranial cavity, intracranial cavity | the cavity enclosed by the cranium. |
| ~ amniotic cavity | the fluid-filled cavity that surrounds the developing embryo. |
| ~ greater peritoneal sac, peritoneal cavity | the interior of the peritoneum; a potential space between layers of the peritoneum. |
| ~ bursa omentalis, lesser peritoneal cavity, omental bursa | an isolated part of the peritoneal cavity that is dorsal to the stomach. |
| ~ pericardial cavity, pericardial space | the space between the layers of the pericardium that contains fluid that lubricates the membrane surfaces and allows easy heart movement. |
| ~ vacuole | a tiny cavity filled with fluid in the cytoplasm of a cell. |
| ~ ventricle | one of four connected cavities in the brain; is continuous with the central canal of the spinal cord and contains cerebrospinal fluid. |
| ~ sac | a structure resembling a bag in an animal. |
| ~ uterine cavity | the space inside the uterus between the cervical canal and the Fallopian tubes. |
| ~ nasal cavity | either of the two cavities lying between the floor of the cranium and the roof of the mouth and extending from the face to the pharynx. |
| ~ nasopharynx | cavity forming the upper part of the pharynx. |
| ~ oropharynx | cavity formed by the pharynx at the back of the mouth. |
| ~ laryngopharynx | the lower part of the pharynx. |
| ~ blind gut, caecum, cecum | the cavity in which the large intestine begins and into which the ileum opens.; "the appendix is an offshoot of the cecum" |
| ~ tubular cavity | a cavity having the shape of a tube. |
| ~ armpit, axilla, axillary cavity, axillary fossa | the hollow under the arm where it is joined to the shoulder.; "they were up to their armpits in water" |
| ~ chest cavity, thoracic cavity | the cavity in the vertebrate body enclosed by the ribs between the diaphragm and the neck and containing the lungs and heart. |
| ~ abdominal cavity, abdomen | the cavity containing the major viscera; in mammals it is separated from the thorax by the diaphragm. |
| ~ renal pelvis, pelvis | a structure shaped like a funnel in the outlet of the kidney into which urine is discharged before passing into the ureter. |
| ~ pelvic cavity | the space bounded by the bones of the pelvis and containing the pelvic viscera. |
| ~ celom, celoma, coelom | a cavity in the mesoderm of an embryo that gives rise in humans to the pleural cavity and pericardial cavity and peritoneal cavity. |
| ~ anatomy, general anatomy | the branch of morphology that deals with the structure of animals. |
| ~ fossa, pit | a concavity in a surface (especially an anatomical depression). |
| hole | | |
| n. (object) | 1. hole | an opening into or through something. |
| ~ aperture | a natural opening in something. |
| ~ bolt-hole | a hole through which an animal may bolt when pursued into its burrow or den. |
| ~ bullet hole | a hole made by a bullet passing through it. |
| ~ cranny | a small opening or crevice (especially in a rock face or wall). |
| ~ leak | an accidental hole that allows something (fluid or light etc.) to enter or escape.; "one of the tires developed a leak" |
| ~ opening, gap | an open or empty space in or between things.; "there was a small opening between the trees"; "the explosion made a gap in the wall" |
| ~ ozone hole | an area of the ozone layer (near the poles) that is seasonally depleted of ozone. |
| ~ perforation | a hole made in something.; "a perforation of the eardrum" |
| ~ rathole | a hole (as in the wall of a building) made by rats. |
| ~ knothole | a hole in a board where a knot came out. |
| n. (artifact) | 2. hole | an opening deliberately made in or through something. |
| ~ air hole | a hole that allows the passage of air. |
| ~ armhole | a hole through which you put your arm and where a sleeve can be attached. |
| ~ bunghole | a hole in a barrel or cask; used to fill or empty it. |
| ~ button hole, buttonhole | a hole through which buttons are pushed. |
| ~ countersink | a hole (usually in wood) with the top part enlarged so that a screw or bolt will fit into it and lie below the surface. |
| ~ cup | the hole (or metal container in the hole) on a golf green.; "he swore as the ball rimmed the cup and rolled away"; "put the flag back in the cup" |
| ~ ear hole | a hole (as in a helmet) for sound to reach the ears. |
| ~ eye | a small hole or loop (as in a needle).; "the thread wouldn't go through the eye" |
| ~ eyelet, eyehole | a small hole (usually round and finished around the edges) in cloth or leather for the passage of a cord or hook or bar. |
| ~ finger hole | a hole for inserting a finger. |
| ~ finger hole | one of a series of holes in a woodwind instrument; pitch changes when a finger covers it. |
| ~ hawse, hawsehole, hawsepipe | the hole that an anchor rope passes through. |
| ~ keyhole | the hole where a key is inserted. |
| ~ loophole | a small hole in a fortified wall; for observation or discharging weapons. |
| ~ lubber's hole | hole in a platform on a mast through which a sailor can climb without going out on the shrouds. |
| ~ manhole | a hole (usually with a flush cover) through which a person can gain access to an underground structure. |
| ~ mortice, mortise | a square hole made to receive a tenon and so to form a joint. |
| ~ mouth hole | a hole (as in a ski mask) for the mouth. |
| ~ nail hole | a hole left after a nail is removed. |
| ~ opening | a vacant or unobstructed space that is man-made.; "they left a small opening for the cat at the bottom of the door" |
| ~ eyehole, peephole, spyhole | a hole (in a door or an oven etc) through which you can peep. |
| ~ perforation | a line of small holes for tearing at a particular place. |
| ~ plughole | a hole into which a plug fits (especially a hole where water drains away). |
| ~ post hole, posthole | a hole dug in the ground to hold a fence post. |
| ~ puncture | a small hole made by a sharp object. |
| ~ sound hole | a hole in a soundboard (as of a violin) designed to resonate with the tones. |
| ~ thumbhole | the hole in a woodwind that is closed and opened with the thumb. |
| ~ vent, vent-hole, venthole, blowhole | a hole for the escape of gas or air. |
| n. (artifact) | 3. golf hole, hole | one playing period (from tee to green) on a golf course.; "he played 18 holes" |
| ~ dogleg | a golf hole with a sharp angle in the fairway. |
| ~ golf course, links course | course consisting of a large landscaped area for playing golf. |
| ~ period of play, playing period, play | (in games or plays or other performances) the time during which play proceeds.; "rain stopped play in the 4th inning" |
| n. (shape) | 4. hole | an unoccupied space. |
| ~ space | an empty area (usually bounded in some way between things).; "the architect left space in front of the building"; "they stopped at an open space in the jungle"; "the space between his teeth" |
| ~ pore | any tiny hole admitting passage of a liquid (fluid or gas). |
| n. (object) | 5. hole, hollow | a depression hollowed out of solid matter. |
| ~ burrow, tunnel | a hole made by an animal, usually for shelter. |
| ~ gopher hole | a hole in the ground made by gophers. |
| ~ kettle hole, kettle | (geology) a hollow (typically filled by a lake) that results from the melting of a mass of ice trapped in glacial deposits. |
| ~ natural depression, depression | a sunken or depressed geological formation. |
| ~ cavity, pit | a sizeable hole (usually in the ground).; "they dug a pit to bury the body" |
| ~ chuckhole, pothole | a pit or hole produced by wear or weathering (especially in a road surface). |
| ~ rabbit burrow, rabbit hole | a hole in the ground as a nest made by wild rabbits. |
| ~ wormhole | hole made by a burrowing worm. |
| n. (state) | 6. hole | a fault.; "he shot holes in my argument" |
| ~ flaw, fault, defect | an imperfection in an object or machine.; "a flaw caused the crystal to shatter"; "if there are any defects you should send it back to the manufacturer" |
| n. (state) | 7. fix, hole, jam, kettle of fish, mess, muddle, pickle | informal terms for a difficult situation.; "he got into a terrible fix"; "he made a muddle of his marriage" |
| ~ difficulty | a condition or state of affairs almost beyond one's ability to deal with and requiring great effort to bear or overcome.; "grappling with financial difficulties" |
| ~ dog's breakfast, dog's dinner | a poor job; a mess.; "they made a real dog's breakfast of that job" |
| n. (body) | 8. cakehole, gob, hole, maw, trap, yap | informal terms for the mouth. |
| ~ mouth, oral cavity, oral fissure, rima oris | the opening through which food is taken in and vocalizations emerge.; "he stuffed his mouth with candy" |
| v. (contact) | 9. hole, hole out | hit the ball into the hole. |
| ~ golf, golf game | a game played on a large open course with 9 or 18 holes; the object is use as few strokes as possible in playing all the holes. |
| ~ hit | cause to move by striking.; "hit a ball" |
| v. (contact) | 10. hole | make holes in. |
| ~ core out, hollow out, hollow | remove the interior of.; "hollow out a tree trunk" |
| pit | | |
| n. (shape) | 1. fossa, pit | a concavity in a surface (especially an anatomical depression). |
| ~ glenoid cavity, glenoid fossa | the concavity in the head of the scapula that receives the head of the humerus to form the shoulder joint. |
| ~ glenoid fossa, mandibular fossa | a deep concavity in the temporal bone at the root of the zygomatic arch that receives the condyle of the mandible. |
| ~ bodily cavity, cavum, cavity | (anatomy) a natural hollow or sinus within the body. |
| ~ epigastric fossa, pit of the stomach | a slight depression in the midline just below the sternum (where a blow can affect the solar plexus). |
| ~ concave shape, concavity, incurvation, incurvature | a shape that curves or bends inward. |
| n. (plant) | 2. endocarp, pit, stone | the hard inner (usually woody) layer of the pericarp of some fruits (as peaches or plums or cherries or olives) that contains the seed.; "you should remove the stones from prunes before cooking" |
| ~ pericarp, seed vessel | the ripened and variously modified walls of a plant ovary. |
| ~ peach pit | the stone seed of a peach. |
| ~ cherry stone | the stone seed of a cherry. |
| n. (cognition) | 3. hell, infernal region, inferno, nether region, perdition, pit | (Christianity) the abode of Satan and the forces of evil; where sinners suffer eternal punishment.; "Hurl'd headlong...To bottomless perdition, there to dwell"; "a demon from the depths of the pit"; "Hell is paved with good intentions" |
| ~ fictitious place, imaginary place, mythical place | a place that exists only in imagination; a place said to exist in fictional or religious writings. |
| ~ gehenna, tartarus | a place where the wicked are punished after death. |
| ~ hellfire, red region | a place of eternal fire envisaged as punishment for the damned. |
| ~ christian religion, christianity | a monotheistic system of beliefs and practices based on the Old Testament and the teachings of Jesus as embodied in the New Testament and emphasizing the role of Jesus as savior. |
| n. (artifact) | 4. pit | an enclosure in which animals are made to fight. |
| ~ cockpit | a pit for cockfights. |
| ~ enclosure | a structure consisting of an area that has been enclosed for some purpose. |
| n. (artifact) | 5. pit | (commodity exchange) the part of the floor of a commodity exchange where trading in a particular commodity is carried on. |
| ~ area | a part of a structure having some specific characteristic or function.; "the spacious cooking area provided plenty of room for servants" |
| ~ commodities exchange, commodities market, commodity exchange | an exchange for buying and selling commodities for future delivery. |
| n. (artifact) | 6. pit | (auto racing) an area at the side of a racetrack where the race cars are serviced and refueled. |
| ~ auto racing, car racing | the sport of racing automobiles. |
| ~ area | a part of a structure having some specific characteristic or function.; "the spacious cooking area provided plenty of room for servants" |
| n. (artifact) | 7. pit, pitfall | a trap in the form of a concealed hole. |
| ~ trap | a device in which something (usually an animal) can be caught and penned. |
| n. (artifact) | 8. pit, quarry, stone pit | a surface excavation for extracting stone or slate.; "a British term for `quarry' is `stone pit'" |
| ~ chalk pit, chalkpit | a quarry for chalk. |
| ~ excavation | a hole in the ground made by excavating. |
| ~ gravel pit | a quarry for gravel. |
| n. (artifact) | 9. orchestra pit, pit | lowered area in front of a stage where an orchestra accompanies the performers. |
| ~ area | a part of a structure having some specific characteristic or function.; "the spacious cooking area provided plenty of room for servants" |
| ~ theater, theatre, house | a building where theatrical performances or motion-picture shows can be presented.; "the house was full" |
| n. (artifact) | 10. colliery, pit | a workplace consisting of a coal mine plus all the buildings and equipment connected with it. |
| ~ coal mine, coalpit | a mine where coal is dug from the ground. |
| ~ mine | excavation in the earth from which ores and minerals are extracted. |
| ~ workplace, work | a place where work is done.; "he arrived at work early today" |
| v. (competition) | 11. match, oppose, pit, play off | set into opposition or rivalry.; "let them match their best athletes against ours"; "pit a chess player against the Russian champion"; "He plays his two children off against each other" |
| ~ confront, face | oppose, as in hostility or a competition.; "You must confront your opponent"; "Jackson faced Smith in the boxing ring"; "The two enemies finally confronted each other" |
| v. (contact) | 12. mark, pit, pock, scar | mark with a scar.; "The skin disease scarred his face permanently" |
| ~ nock, score, mark | make small marks into the surface of.; "score the clay before firing it" |
| ~ blemish, deface, disfigure | mar or spoil the appearance of.; "scars defaced her cheeks"; "The vandals disfigured the statue" |
| ~ pockmark | mark with or as if with pockmarks.; "Her face was pockmarked by the disease" |
| ~ cicatrise, cicatrize | form a scar, after an injury.; "the skin will cicatrize and it will heal soon" |
| ~ incise | make an incision into by carving or cutting. |
| v. (change) | 13. pit, stone | remove the pits from.; "pit plums and cherries" |
| ~ remove, take away, withdraw, take | remove something concrete, as by lifting, pushing, or taking off, or remove something abstract.; "remove a threat"; "remove a wrapper"; "Remove the dirty dishes from the table"; "take the gun from your pocket"; "This machine withdraws heat from the environment" |
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