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[thurs] /θɜrs/
noun, Botany
a compact branching inflorescence, as of the lilac, in which the main axis is indeterminate and the lateral axes are determinate.
Also, thyrsus.
Origin of thyrse
1595-1605; < French < Latin thyrsus thyrsus Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for thyrse


noun (pl) thyrses, thyrsi (ˈθɜːsaɪ)
(botany) a type of inflorescence, occurring in the lilac and grape, in which the main branch is racemose and the lateral branches cymose
Derived Forms
thyrsoid, adjective
Word Origin
C17: from French: thyrsus
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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thyrse in Science
A dense inflorescence in which the side branches end in cymes, as in the lilac. Also called thyrsus. See more at inflorescence.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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