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[al-kahyn] /ˈæl kaɪn/
noun, Chemistry
any member of the alkyne series.
Also, alkine.
1880-85; alk(yl) + -ine2, altered to -yne Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for alkynes
  • Unsaturated hydrocarbons such as alkenes and alkynes are considered lewis bases.
British Dictionary definitions for alkynes


  1. any unsaturated aliphatic hydrocarbon that has a formula of the type CnH2n–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
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alkynes in Science
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 © 2002. Published by Houghton Mifflin. All rights reserved.
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