'Involucre' definitions:
Definition of 'involucre'
(from WordNet)
noun
A highly conspicuous bract or bract pair or ring of bracts at the base of an inflorescence
Definition of 'Involucre'
From: GCIDE
- Involucre \In"vo*lu`cre\ (?; 277), n. [L. involucrum a covering, wrapper, fr. involvere to wrap up, envelop: cf. F. involucre. See Involve.] (Bot.) (a) A whorl or set of bracts around a flower, umbel, or head. (b) A continuous marginal covering of sporangia, in certain ferns, as in the common brake, or the cup-shaped processes of the filmy ferns. (c) The peridium or volva of certain fungi. Called also involucrum. [1913 Webster]