noun Chemistry.

  1. any member of the alkyne series.


    1. any unsaturated aliphatic hydrocarbon that has a formula of the type C n H 2 n –2
    2. (as modifier)alkyne series

    Also called: acetylene

  1. Any of a group of unsaturated hydrocarbons that havee carbon atoms in chains linked by one or more triple bonds and that have the general formula CnH2n-2. Alkynes can be solid, liquid, or gaseous and include acetylene.♦ The group of alkynes as a whole is called the alkyne series or the acetylene series. The first five members of the alkyne series are acetylene (or ethyne), propyne, butyne, pentyne, and hexyne.

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