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1. A bract, usually one of two, at the base of a grass spikelet.
2. A bract in a sedge spikelet, usually subtending a floret.
glu·ma′ceous (glo͞o-mā′shəs) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.