Found 2 items, similar to involucra.
English → English (WordNet) Definition: involucra involucra See involucre involucra See involucrum involucre n : a highly conspicuous bract or bract pair or ring of bracts at the base of an inflorescence [also: involucra (pl)]
English → English (gcide) Definition: Involucra Involucrum \In`vo*lu"crum\, n.; pl. L. Involucra, E. Involucrums. [L. See Involucre.] [1913 Webster] 1. (Bot.) See Involucre. [1913 Webster] 2. (Zo["o]l.) A sheath which surrounds the base of the lasso cells in the Siphonophora. [1913 Webster]