'Involucrum' definitions:
Definition of 'Involucrum'
From: GCIDE
- Involucrum \In`vo*lu"crum\, n.; pl. L. Involucra, E. Involucrums. [L. See Involucre.] [1913 Webster]
- 1. (Bot.) See Involucre. [1913 Webster]
- 2. (Zool.) A sheath which surrounds the base of the lasso cells in the Siphonophora. [1913 Webster]
Definition of 'involucrum'
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]