from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A colorless, highly flammable or explosive gas, C2H2, used for metal welding and cutting and as an illuminant. Also called ethyne.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any organic compound having one or more carbon–carbon triple bonds; an alkyne.
- n. Ethyne; the simplest alkyne, a hydrocarbon of formula HC≡CH. It is a colourless gas, with a peculiar, unpleasant odour, formerly used as an illuminating gas, but now used in welding or metallurgy.
from the GNU version of the Collaborative International Dictionary of English
- n. A gaseous compound of carbon and hydrogen, in the proportion of two atoms of the former to two of the latter. It is a colorless gas, with a peculiar, unpleasant odor, and is produced for use as an illuminating gas in a number of ways, but chiefly by the action of water on calcium carbide. Its light is very brilliant.
from The Century Dictionary and Cyclopedia
- n. A colorless gas, C2H2, which has a characteristic and very unpleasant odor, and burns with a luminous smoky flame.
- n. This gas, C2H2, prepared by the action of water on calcium carbide, is now largely used as an illuminant and to increase the illuminating value of coal-gas and water-gas of poor quality.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a colorless flammable gas used chiefly in welding and in organic synthesis
From French acétylène, coined by French chemist Marcellin Berthelot, from acetyl. (Wiktionary)