| organ | | |
| n. (body) | 1. organ | a fully differentiated structural and functional unit in an animal that is specialized for some particular function. |
| ~ ovipositor | egg-laying tubular structure at the end of the abdomen in many female insects and some fishes. |
| ~ siphon, syphon | a tubular organ in an aquatic animal (especially in mollusks) through which water can be taken in or expelled. |
| ~ comb-plate, ctene | a locomotor organ consisting of a row of strong cilia whose bases are fused. |
| ~ wing | a movable organ for flying (one of a pair). |
| ~ invertebrate foot, foot | any of various organs of locomotion or attachment in invertebrates. |
| ~ sucker | an organ specialized for sucking nourishment or for adhering to objects by suction. |
| ~ stinger | a sharp organ of offense or defense (as of a wasp or stingray or scorpion) often connected with a poison gland. |
| ~ body part | any part of an organism such as an organ or extremity. |
| ~ contractile organ, contractor | a bodily organ that contracts. |
| ~ anlage, primordium | an organ in its earliest stage of development; the foundation for subsequent development. |
| ~ vital organ, vitals | a bodily organ that is essential for life. |
| ~ effector | an organ (a gland or muscle) that becomes active in response to nerve impulses. |
| ~ external organ | an organ that is situated on or near the surface of the body. |
| ~ internal organ, viscus | a main organ that is situated inside the body. |
| ~ sense organ, sensory receptor, receptor | an organ having nerve endings (in the skin or viscera or eye or ear or nose or mouth) that respond to stimulation. |
| ~ glossa, lingua, tongue, clapper | a mobile mass of muscular tissue covered with mucous membrane and located in the oral cavity. |
| ~ organ of speech, speech organ, vocal organ | any of the organs involved in speech production. |
| ~ crystalline lens, lens of the eye, lens | biconvex transparent body situated behind the iris in the eye; its role (along with the cornea) is to focuses light on the retina. |
| ~ gland, secreter, secretor, secretory organ | any of various organs that synthesize substances needed by the body and release it through ducts or directly into the bloodstream. |
| ~ cell organ, cell organelle, organelle | a specialized part of a cell; analogous to an organ.; "the first organelle to be identified was the nucleus" |
| ~ end organ | a specialized structure at the peripheral end of some motor or sensory nerve fibers. |
| ~ lobe | (anatomy) a somewhat rounded subdivision of a bodily organ or part.; "ear lobe" |
| ~ reproductive organ, sex organ | any organ involved in sexual reproduction. |
| ~ target organ | (radiology) organ intended to receive the therapeutic dose of a radioactive substance. |
| ~ taret organ | (endocrinology) organ most affected by a particular hormone. |
| ~ erectile organ | an organ containing erectile tissue. |
| n. (group) | 2. organ | a government agency or instrument devoted to the performance of some specific function.; "The Census Bureau is an organ of the Commerce Department" |
| ~ agency, bureau, federal agency, government agency, office, authority | an administrative unit of government.; "the Central Intelligence Agency"; "the Census Bureau"; "Office of Management and Budget"; "Tennessee Valley Authority" |
| n. (artifact) | 3. electric organ, electronic organ, hammond organ, organ | (music) an electronic simulation of a pipe organ. |
| ~ electronic instrument, electronic musical instrument | a musical instrument that generates sounds electronically. |
| ~ music | an artistic form of auditory communication incorporating instrumental or vocal tones in a structured and continuous manner. |
| n. (communication) | 4. organ | a periodical that is published by a special interest group.; "the organ of the communist party" |
| ~ periodical | a publication that appears at fixed intervals. |
| ~ house organ | a periodical published by a business firm for its employees and customers. |
| n. (artifact) | 5. organ, pipe organ | wind instrument whose sound is produced by means of pipes arranged in sets supplied with air from a bellows and controlled from a large complex musical keyboard. |
| ~ keyboard | device consisting of a set of keys on a piano or organ or typewriter or typesetting machine or computer or the like. |
| ~ keyboard instrument | a musical instrument that is played by means of a keyboard. |
| ~ organ pipe, pipework, pipe | the flues and stops on a pipe organ. |
| ~ foot lever, foot pedal, treadle, pedal | a lever that is operated with the foot. |
| ~ clavier, piano keyboard, fingerboard | a bank of keys on a musical instrument. |
| ~ stop | (music) a knob on an organ that is pulled to change the sound quality from the organ pipes.; "the organist pulled out all the stops" |
| ~ wind instrument, wind | a musical instrument in which the sound is produced by an enclosed column of air that is moved by the breath. |
| n. (artifact) | 6. harmonium, organ, reed organ | a free-reed instrument in which air is forced through the reeds by bellows. |
| ~ free-reed instrument | a wind instrument with a free reed. |
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