| gas | | |
| n. (state) | 1. gas, gaseous state | the state of matter distinguished from the solid and liquid states by: relatively low density and viscosity; relatively great expansion and contraction with changes in pressure and temperature; the ability to diffuse readily; and the spontaneous tendency to become distributed uniformly throughout any container. |
| ~ state of matter, state | (chemistry) the three traditional states of matter are solids (fixed shape and volume) and liquids (fixed volume and shaped by the container) and gases (filling the container).; "the solid state of water is called ice" |
| n. (substance) | 2. gas | a fluid in the gaseous state having neither independent shape nor volume and being able to expand indefinitely. |
| ~ atmosphere | the envelope of gases surrounding any celestial body. |
| ~ argonon, inert gas, noble gas | any of the chemically inert gaseous elements of the helium group in the periodic table. |
| ~ atomic number 17, chlorine, cl | a common nonmetallic element belonging to the halogens; best known as a heavy yellow irritating toxic gas; used to purify water and as a bleaching agent and disinfectant; occurs naturally only as a salt (as in sea water). |
| ~ atomic number 9, fluorine, f | a nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite or cryolite or fluorapatite. |
| ~ atomic number 1, h, hydrogen | a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe. |
| ~ atomic number 7, n, nitrogen | a common nonmetallic element that is normally a colorless odorless tasteless inert diatomic gas; constitutes 78 percent of the atmosphere by volume; a constituent of all living tissues. |
| ~ atomic number 8, o, oxygen | a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth's crust. |
| ~ butane | occurs in natural gas; used in the manufacture of rubber and fuels. |
| ~ propane | colorless gas found in natural gas and petroleum; used as a fuel. |
| ~ afterdamp | a toxic mixture of gases (including carbon dioxide and carbon monoxide and nitrogen) after an explosion of firedamp in a mine. |
| ~ firedamp | a mixture of gases (mostly methane) that form in coal mines and become explosive when mixed with air. |
| ~ arsine | a poisonous colorless flammable gas used in organic synthesis and to dope transistors and as a poison gas in warfare. |
| ~ nitrogen dioxide | a highly poisonous brown gas (NO2). |
| ~ nitric oxide | a poisonous red-brown gas (NO). |
| ~ blow gas, blowing gas | the gas leaving a generator during a blow period. |
| ~ butene, butylene | any of three isomeric hydrocarbons C4H8; all used in making synthetic rubbers. |
| ~ cyanogen | a colorless toxic gas with a pungent almond odor; has been used in chemical warfare. |
| ~ exhaust, exhaust fumes, fumes | gases ejected from an engine as waste products. |
| ~ air | a mixture of gases (especially oxygen) required for breathing; the stuff that the wind consists of.; "air pollution"; "a smell of chemicals in the air"; "open a window and let in some air"; "I need some fresh air" |
| ~ compressed gas | gas at a high pressure that can be used as a propellant. |
| ~ ethene, ethylene | a flammable colorless gaseous alkene; obtained from petroleum and natural gas and used in manufacturing many other chemicals; sometimes used as an anesthetic. |
| ~ air gas, producer gas | a gas made of carbon monoxide and hydrogen and nitrogen; made by passing air over hot coke. |
| ~ formaldehyde, methanal | a colorless poisonous gas; made by the oxidation of methanol. |
| ~ greenhouse emission, greenhouse gas | a gas that contributes to the greenhouse effect by absorbing infrared radiation. |
| ~ bottled gas, liquefied petroleum gas | hydrocarbon gases, usually propane or butane, kept under pressure. |
| ~ water gas | a mixture of hydrogen and carbon monoxide with small amounts of other gases; made by blowing steam over hot coke or coal. |
| ~ ideal gas, perfect gas | a hypothetical gas with molecules of negligible size that exert no intermolecular forces. |
| ~ inhalant | something that is inhaled. |
| ~ fluid | continuous amorphous matter that tends to flow and to conform to the outline of its container: a liquid or a gas. |
| ~ methane | a colorless odorless gas used as a fuel. |
| ~ ozone | a colorless gas (O3) soluble in alkalis and cold water; a strong oxidizing agent; can be produced by electric discharge in oxygen or by the action of ultraviolet radiation on oxygen in the stratosphere (where it acts as a screen for ultraviolet radiation). |
| ~ phosgene | a colorless poisonous gas that smells like new-mown hay; used in chemical warfare. |
| ~ phosphine | a colorless gas with a strong fishy smell; used as a pesticide. |
| ~ poison gas | a gas that is poisonous to breath or contact; used in chemical warfare. |
| ~ propene, propylene | a flammable gas obtained by cracking petroleum; used in organic synthesis. |
| ~ mephitis | a poisonous or foul smelling gas emitted from the earth. |
| ~ sewer gas | foul-smelling gas that forms in sewers. |
| ~ sublimate | the product of vaporization of a solid. |
| ~ sulfur dioxide, sulphur dioxide | a colorless toxic gas (SO2) that occurs in the gases from volcanoes; used in many manufacturing processes and present in industrial emissions; causes acid rain. |
| ~ lachrymator, lacrimator, tear gas, teargas | a gas that makes the eyes fill with tears but does not damage them; used in dispersing crowds. |
| n. (substance) | 3. gas, gasolene, gasoline, petrol | a volatile flammable mixture of hydrocarbons (hexane and heptane and octane etc.) derived from petroleum; used mainly as a fuel in internal-combustion engines. |
| ~ gasohol | a gasoline substitute consisting of 90% gasoline and 10% grain alcohol from corn. |
| ~ leaded gasoline, leaded petrol | gasoline treated with a lead compound to reduce motor knocks.; "combustion of leaded gasoline released lead into the air where it could cause lead poisoning" |
| ~ fuel | a substance that can be consumed to produce energy.; "more fuel is needed during the winter months"; "they developed alternative fuels for aircraft" |
| ~ hydrocarbon | an organic compound containing only carbon and hydrogen. |
| ~ napalm | gasoline jelled with aluminum soaps; highly incendiary liquid used in fire bombs and flamethrowers. |
| ~ unleaded gasoline, unleaded petrol | gasoline that has not been treated with a lead compound. |
| n. (state) | 4. flatulence, flatulency, gas | a state of excessive gas in the alimentary canal. |
| ~ physical condition, physiological condition, physiological state | the condition or state of the body or bodily functions. |
| n. (artifact) | 5. accelerator, accelerator pedal, gas, gas pedal, gun, throttle | a pedal that controls the throttle valve.; "he stepped on the gas" |
| ~ aeroplane, airplane, plane | an aircraft that has a fixed wing and is powered by propellers or jets.; "the flight was delayed due to trouble with the airplane" |
| ~ auto, automobile, car, motorcar, machine | a motor vehicle with four wheels; usually propelled by an internal combustion engine.; "he needs a car to get to work" |
| ~ foot lever, foot pedal, treadle, pedal | a lever that is operated with the foot. |
| n. (substance) | 6. gas, natural gas | a fossil fuel in the gaseous state; used for cooking and heating homes. |
| ~ fossil fuel | fuel consisting of the remains of organisms preserved in rocks in the earth's crust with high carbon and hydrogen content. |
| ~ methane | a colorless odorless gas used as a fuel. |
| v. (competition) | 7. gas | attack with gas; subject to gas fumes.; "The despot gassed the rebellious tribes" |
| ~ attack, assail | launch an attack or assault on; begin hostilities or start warfare with.; "Hitler attacked Poland on September 1, 1939 and started World War II"; "Serbian forces assailed Bosnian towns all week" |
| ~ teargas | attack with teargas; subject to teargas fumes.; "The students were teargassed during the riot" |
| v. (communication) | 8. blow, bluster, boast, brag, gas, gasconade, shoot a line, swash, tout, vaunt | show off. |
| ~ puff | speak in a blustering or scornful manner.; "A puffing kind of man" |
| ~ exaggerate, hyperbolise, hyperbolize, overstate, amplify, magnify, overdraw | to enlarge beyond bounds or the truth.; "tended to romanticize and exaggerate this `gracious Old South' imagery" |
| ~ crow, gloat, triumph | dwell on with satisfaction. |
| kerosene | | |
| n. (substance) | 1. coal oil, kerosene, kerosine, lamp oil | a flammable hydrocarbon oil used as fuel in lamps and heaters. |
| ~ fuel | a substance that can be consumed to produce energy.; "more fuel is needed during the winter months"; "they developed alternative fuels for aircraft" |
| ~ hydrocarbon | an organic compound containing only carbon and hydrogen. |
| ~ paraffin oil, paraffin | (British usage) kerosine. |
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