alkynes

https://doi.org/10.1351/goldbook.A00236
Acyclic branched or unbranched @H02889@ having a carbon-carbon triple bond and the general formula CnH2n-2, RC≡CR. Acyclic branched or unbranched @H02889@ 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 [Terms] [Paper]