or al·kine


noun Chemistry.

any member of the alkyne series.

Nearby words

  1. alkylate,
  2. alkylating agent,
  3. alkylating drug,
  4. alkylation,
  5. alkylic,
  6. alkyne series,
  7. all,
  8. all along,
  9. all along the line,
  10. all and sundry

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



  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



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.