alkyne alkyloxy • allabuta · · · Info · Definitions · Synonyms · Characters · · alkyne · · Text Latin · · Script 6 · · Length Definitions · · · (noun) a colorless flammable gas used chiefly in welding and in organic synthesis. Synonyms: acetylene, ethyne. · · Noun Definition 1 Synonyms · · · acetylene · · Synonym 1 ethyne · · Synonym 2 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 k latin small letter k U+006B l latin small letter l U+006C n latin small letter n U+006E y latin small letter y U+0079