Word Study
cirripedia
CIDE DICTIONARY
cirripedia, n. pl. [NL., fr. L. cirrus curl + pes, pedis, foot.].
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. [1913 Webster]
For further exploring for "cirripedia" in Webster Dictionary Online