Acyclic branched or unbranched hydrocarbons having a carbon-carbon triple bond and the general formula
CnH2n-2,
RC≡CR. Acyclic branched or unbranched hydrocarbons having more than one triple bond are known as alkadiynes, alkatriynes, etc.
See also: acetylenes
Source:
PAC, 1995, 67, 1307. 'Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)' on page 1314 (https://doi.org/10.1351/pac199567081307)