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[jem-uh] /ˈdʒɛm ə/
noun, plural gemmae
[jem-ee] /ˈdʒɛm i/ (Show IPA)
a bud.
Botany. a cell or cluster of cells, or a leaflike or budlike body, that separates from the parent plant to form a new organism, as in mosses and liverworts.
Origin of gemma
1760-70; < Latin: bud, gem Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for gemma
  • gemma was charged with one count of bribery concerning programs receiving federal funds.
  • gemma says she's been out in the field nearly every day, but has also been able to sit in on negotiation meetings.
British Dictionary definitions for gemma


noun (pl) -mae (-miː)
a small asexual reproductive structure in liverworts, mosses, etc, that becomes detached from the parent and develops into a new individual
(zoology) another name for gemmule (sense 1)
Derived Forms
gemmaceous (dʒɛˈmeɪʃəs) adjective
Word Origin
C18: from Latin: bud, gem
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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gemma in Science
Plural gemmae (jěm'ē')
A budlike mass of undifferentiated tissue which serves as a means of vegetative reproduction among mosses and liverworts. The gemmae, often formed in structures called gemma cups, are usually dispersed from the parent plant by the splashing of raindrops, after which they develop into new individuals.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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