or al·kine

[ al-kahyn ]
/ ˈæl kaɪn /

noun Chemistry.

any member of the alkyne series.

Origin of alkyne

1880–85; alk(yl) + -ine2, altered to -yne Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for alkyne

/ (ˈælkaɪn) /


  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
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Science definitions for alkyne

[ ălkīn′ ]

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.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.