alkyne

Alkynes are hydrocarbons that have at least one triple bond between two carbon atoms, with the formula CnH2n-2. The alkynes are traditionally known as acetylenes or the acetylene series, although the name acetylene is also used to refer specifically to the simplest member of the series, known as ethyne (C2H2) using formal IUPAC nomenclature.
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Alkyne, n unsaturated hydrocarbon compound that has triple covalent bonds and C n H 2n-2 as the general chemical formula. [more]Alkyne - Community and Resources

Noun
1. a colorless flammable gas used chiefly in welding and in organic synthesis
(synonym) acetylene, ethyne
(hypernym) aliphatic compound
(substance-holonym) oxyacetylene

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A compound that consists of only carbon and hydrogen, that contains at least one carbon-carbon triple bond. Alkyne names end with -yne. Examples are acetylene (CHCH); 1-propyne (CH2CH2CH3), and 2-octyne (CH3CH2CH2(CH2)4CH3).

ALCHINO