'Cladocera' definitions:

Definition of 'Cladocera'

From: GCIDE

Cladocera \Cla*doc"e*ra\, n. pl. [NL., fr. Gr. ? a sprout + ? a horn.] (Zool.) An order of the Entomostraca. [1913 Webster]
Note: They have a bivalve shell, covering the body but not the head, and from four to six pairs of legs and two pairs of anten[ae], for use in swimming. They mostly inhabit fresh water. [1913 Webster]