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[ahy-suh-preen] /ˈaɪ səˌprin/
noun, Chemistry.
a colorless, volatile, water-insoluble liquid, C 5 H 8 , of the terpene class, usually obtained from rubber or from oil of turpentine by pyrolysis: used chiefly in the manufacture of synthetic rubber by polymerization.
Origin of isoprene
1855-60; iso- + -pr- (< ?) + -ene; see terpene Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for isoprene


a colourless volatile liquid with a penetrating odour: used in making synthetic rubbers. Formula: CH2:CHC(CH3):CH2 Systematic name methylbuta-1,3-diene
Word Origin
C20: from iso- + pr(opyl) + -ene
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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isoprene in Medicine

isoprene i·so·prene (ī'sə-prēn')
A colorless volatile hydrocarbon that is the naturally occurring basis of isoprenoids and that is used in the production of synthetic rubber.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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isoprene in Science
A colorless, volatile liquid obtained from petroleum or coal tar and occurring naturally in many plants. It is used chiefly to make synthetic rubber. The isoprene in plants occurs in the chloroplasts and is used to build terpenes and other biologically important chemicals. Chemical formula: C5H8.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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