Bible Dictionaries
Ymnophthalmata
Webster's Dictionary
(n. pl.) 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.
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Bibliography Information
Webster, Noah. Entry for 'Ymnophthalmata'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​y/ymnophthalmata.html. 1828.