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