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1. Radially symmetrical animals having saclike bodies with only one opening and tentacles with stinging structures; they occur in polyp and medusa forms
   "in some species of coelenterate, polyps are a phase in the life cycle that alternates with a medusoid phase";
   - cnidarian

Derived forms: coelenterates

Type of: invertebrate

Part of: Cnidaria, Coelenterata, phylum Cnidaria, phylum Coelenterata

Encyclopedia: Coelenterate