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[in-vuh-loo-kruh m] /ˌɪn vəˈlu krəm/
noun, plural involucra
[in-vuh-loo-kruh] /ˌɪn vəˈlu krə/ (Show IPA)
Origin of involucrum
1670-80; < New Latin, Latin involūcrum a wrap, cover, equivalent to involū- (variant stem of involvere to wrap, cover; see involute) + -crum instrumental suffix Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for involucrum


noun (pl) -cres, -cra (-krə)
a ring of bracts at the base of an inflorescence in such plants as the composites
Derived Forms
involucral, adjective
involucrate, adjective
Word Origin
C16 (in the sense: envelope): from New Latin involucrum, from Latin: wrapper, from involvere to wrap; see involve
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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involucrum in Medicine

involucrum in·vo·lu·crum (ĭn'və-lōō'krəm)
n. pl. in·vo·lu·cra (-krə)
An enveloping sheath or membrane, such as the sheath of new bone that forms around a sequestrum.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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