noun Botany.
an enlarged, fleshy, bulblike base of a stem, as in the crocus.

1820–30; < Neo-Latin cormus < Greek kormós a tree trunk with boughs lopped off, akin to keírein to cut off, hew

cormlike, adjective
cormoid, adjective
cormous, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
corm (kɔːm)
Compare bulb an organ of vegetative reproduction in plants such as the crocus, consisting of a globular stem base swollen with food and surrounded by papery scale leaves
[C19: from New Latin cormus, from Greek kormos tree trunk from which the branches have been lopped]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin & History

1570s, from Fr. corme, from L. cornum "cornel-cherry" (but applied to service-berries in French); see cornel.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
corm  [%PREMIUM_LINK%]     (kôrm)  Pronunciation Key 
A fleshy underground stem that is similar to a bulb but stores its food as stem tissue and has fewer and thinner leaflike scales. The crocus and gladiolus produce new shoots from corms. Compare bulb, rhizome, runner, tuber.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
The root, also called a corm or tuber, as well as the petioles and leaves are consumed.
Rapid increases in shoot growth precede rapid increases in corm weight.
Although the above ground part of the plant is gone, below ground the corm is alive and well.
The new corm forms at the shoot base just above the old corm.
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