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| any of numerous usually marine and free-swimming coelenterates that constitute the sexually reproductive forms of hydrozoans and scyphozoans | ||||
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| [in greek_mythology] a woman transformed into a Gorgon by Athena; she was slain by Perseus | ||||
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| one of two forms that coelenterates take: it is the free-swimming sexual phase in the life cycle of a coelenterate; in this phase it has a gelatinous umbrella-shaped body and tentacles |