Cirripedia /(?)/

Cir·ri·pe·di·a

Cirripedia

n. pl.
  1. 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. (Zool.)