资料来源 : Webster's Revised Unabridged Dictionary (1913)

Gymnocopa \Gym"no*co`pa\, n. pl. [NL., fr. Gr. gymno`s naked + ?
   an oar.] (Zo["o]l.)
   A group of transparent, free-swimming Annelida, having setae
   only in the cephalic appendages.