CirripediaCir`ri*pe"di*a\, n. pl. [NL., fr. L. cirrus curl + pes, pedis, foot.] (Zo["o]l.) An order of Crustacea including the barnacles. When adult, they have a calcareous shell composed of several pieces. From the opening of the shell the animal throws out a group of curved legs, looking like a delicate curl, whence the name of the group. See Anatifa.