noun, plural columellae [kol-yuh-mel-ee] . Biology.
any of various small, columnlike structures of animals or plants; rod or axis.
Mycology. a small central column of sterile tissue within the sporangium of certain fungi, liverworts, and mosses.
a small bone in the ear of amphibians, reptiles, and birds.

1575–85; < Latin: small column, equivalent to colum- (variant of column-, stem of columna column) + -ella -elle

columellar, adjective
columellate [kol-yuh-mel-it, -eyt] , adjective
postcolumellar, adjective
pseudocolumellar, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
columella (ˌkɒljʊˈmɛlə)
n , pl -lae
1.  biology
 a.  the central part of the spore-producing body of some fungi and mosses
 b.  any similar columnar structure
2.  Also called: columella auris a small rodlike bone in the middle ear of frogs, reptiles, and birds that transmits sound to the inner ear: homologous to the mammalian stapes
[C16: from Latin: diminutive of columnacolumn]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

columella col·u·mel·la (kŏl'yə-měl'ə, kŏl'ə-) or col·um·nel·la (kŏl'əm-něl'ə)
n. pl. col·u·mel·lae (-měl'ē) or col·um·nel·lae (-něl'ē)
A column-shaped anatomical structure.

col'u·mel'lar (-měl'ər) adj.
col'u·mel'late' (-měl'āt') adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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