The Collaborative International Dictionary
Gymnocopa
Gymnocopa \Gym`no*co"pa\ (j[i^]m`n[-o]*k[=o]"p[.a]), n. pl. [NL., fr. Gr. gymno`s naked + kw`ph an oar.] (Zo["o]l.) A group of transparent, free-swimming Annelida, having set[ae] only in the cephalic appendages.