[ loo-kuh-trahy-een ]
/ ˌlu kəˈtraɪ in /

noun Biochemistry.

a lipid, C20H30O3, produced by white blood cells in an immune response to antigens, that contributes to allergic asthma and inflammatory reactions.

Origin of leukotriene

First recorded in 1975–80; leuko- + triene
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for leukotriene

/ (ˌluːkəʊˈtraɪiːn) /


one of a class of products of metabolic conversion of arachidonic acid; the active constituents of slow-reacting substance, responsible for bronchial constriction, contraction of smooth muscle, and inflammatory processes

Word Origin for leukotriene

C20: from leukocyte, in which they were discovered + triene from the conjugated triene unit that they contain
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

Medical definitions for leukotriene

[ lōō′kə-trīēn′ ]


Any of a group of physiologically active substances that function both as mediators of inflammation and as participants in allergic responses.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.