'Malacozoa' definitions:

Definition of 'Malacozoa'

From: GCIDE

Malacozoa \Mal`a*co*zo"a\, n. pl. [NL., fr. Gr. malako`s soft + zo^,on an animal.] (Zool.) An extensive group of Invertebrata, including the Mollusca, Brachiopoda, and Bryozoa. Called also Malacozoaria. [1913 Webster]