[in-vuh-loo-kruh m]

noun, plural in·vo·lu·cra [in-vuh-loo-kruh] /ˌɪn vəˈlu krə/.

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 Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for involucrum

Historical Examples of involucrum

  • They have also always an involucrum below the298 calyx, but this involucrum differs in the different genera.

  • In the genus Malva, the involucrum consists of three leaflets, which in the common Mallow (Malva sylvestris) are oblong.

  • As the seeds ripen, the involucrum falls off, but the large loose-looking calyx remains on.

  • It belongs to that section of its numerous genus having an involucrum of stalked leaflets.

  • The leaves are triternate, divisions deeply cut and acute; the leaves of the involucrum are stalked, trifid, and deeply cut.

involucrum in Medicine



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.