| medusa | one of two forms that coelenterates take: is the free-swimming sexual stage in the life cycle of a coelenterate and has a gelatinous umbrella-shaped body and tentacles |
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| medusa | any of numerous usually marine and free-swimming coelenterates that constitute the sexually reproductive forms of hydrozoans and scyphozoans |
| medusa | (Greek mythology) a woman transformed into a Gorgon by Athena |
| medusa | weedy rye grass having long bristling awns |
| medusa | African dwarf succulent perennial shrub with numerous slender drooping branches |
| medusa | any of numerous usually marine and free-swimming coelenterates that constitute the sexually reproductive forms of hydrozoans and scyphozoans |