Gym`noph*thal"ma*ta (?), n. pl. [NL., fr. Gr. gymno`s naked + the eye.] Zool.

A group of acalephs, including the naked-eyed medusae; the hydromedusae. Most of them are known to be the free-swimming progeny (gonophores) of hydroids.

 

© Webster 1913.

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