Definify.com
Webster 1913 Edition
Gymnophthalmata
‖
Gymˊnoph-thal′ma-ta
(jĭmˊnŏf-thăl′mȧ-tȧ)
, Noun.
pl.
[NL., fr. Gr.
γυμνόσ
naked + ὀφθαλμόσ
the eye.] (Zool.)
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.