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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. 2018.
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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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