marine crustaceans with feathery food-catching appendages;
free-swimming as larvae; as adults form a hard shell and live attached to submerged surfaces Synonym(s):barnacle, cirriped, cirripede
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Cirriped \Cir"ri*ped\, n. (Zo[94]l.)
One of the Cirripedia.