(definition) by Webster 1913 Wed Dec 22 1999 at 0:32:09

In`vo*lu"crum (?), n.; pl. L. Involucra (#), E. Involucrums (#). [L. See Involucre.]

1. Bot.

See Involucre.

2. Zool.

A sheath which surrounds the base of the lasso cells in the Siphonophora.

 

© Webster 1913.

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