involucre

[in-vuh-loo-ker]
noun
  1. Botany. a collection or rosette of bracts subtending a flower cluster, umbel, or the like.
  2. a covering, especially a membranous one.

Origin of involucre

1570–80; < Middle French < Latin involūcrum involucrum
Related formsin·vo·lu·cral, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for involucre

involucre

involucrum (ˌɪnvəˈluːkrəm)

noun plural -cres or -cra (-krə)
  1. a ring of bracts at the base of an inflorescence in such plants as the composites
Derived Formsinvolucral, adjectiveinvolucrate, adjective

Word Origin for involucre

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 Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

involucre in Science

involucre

[ĭn′-və-lōōkər]
  1. A series of bracts beneath or around a flower or flower cluster. The cupule, the cuplike structure holding an oak acorn, is a modified, woody involucre.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.