Any of various marine cnidarians of the class Scyphozoa, which includes most of the jellyfishes, characterized by the absence of a polyp stage or by a polyp that is extremely small.
[From New Latin Scyphozōa, class name : Greek skuphos, cup + New Latin -zōa, pl. of -zōon, -zoon.]
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Indo-European & Semitic Roots Appendices
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