gymnophthalmata Meaning, Definition & Usage

Gym`noph*thal"ma*ta noun plural
Etymology
NL., fr. Gr. gymno`s naked + the eye.
Definitions
  1. (Zoöl.) A group of acalephs, including the naked-eyed medusæ; the hydromedusæ. Most of them are known to be the free-swimming progeny (gonophores) of hydroids.

Webster 1913