Answer
Definition: Hydrocarbons containing one or more C-C triple bond.
Example: Propyne $C_3H_4$
Work Step by Step
An alkyne is an unsaturated hydrocarbon with at least one triple bond between two of its carbons. The simplest acyclic alkynes with only one triple bond and no other functional groups form a homologous series with the general chemical formula $C_nH_{2nā2}$.
Example: Propyne $C_3H_4$