\Cla*doc"e*ra\, n. pl. [NL., fr. Gr. ? a sprout + ? a
horn.] (Zo["o]l.)
An order of the Entomostraca.
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.