‖n. pl. [ NL., fr. Gr. &unr_; a sprout + &unr_; a horn. ] (Zool.) An order of the Entomostraca. [ 1913 Webster ]

☞ They have a bivalve shell, covering the body but not the head, and from four to six pairs of legs and two pairs of antenæ, for use in swimming. They mostly inhabit fresh water. [ 1913 Webster ]