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noun Botany.
  1. one of the characteristic chafflike bracts of the inflorescence of grasses, sedges, etc., especially one of the pair of bracts at the base of a spikelet.
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Origin of glume

1570–80; < Latin glūma husk enclosing a cereal grain, probably equivalent to glūb(ere) to strip the bark from + *-sma noun suffix
Related formsglume·like, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for glume


  1. botany one of a pair of dry membranous bracts at the base of the spikelet of grasses
  2. the bract beneath each flower in a sedge or related plant
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Derived Formsglumaceous, adjectiveglumelike, adjective

Word Origin

C18: from Latin glūma husk of corn; related to Latin glūbere to remove the bark from
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

glume in Science


  1. One of the two chaffy bracts at the base of a grass spikelet.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.