"medusoid" in the noun sense
1. medusa, medusoid, medusan
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
"medusoid" in the adjective sense
1. medusoid
relating to or resembling a medusa
Source: WordNet® (An amazing lexical database of English)
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