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1. A small vascular growth on the surface of a mucous membrane
   - polypus
    
2. One of two forms that coelenterates take (e.g. a hydra or coral): usually sedentary with a hollow cylindrical body usually with a ring of tentacles around the mouth
   "in some species of coelenterate, polyps are a phase in the life cycle that alternates with a medusoid phase"

Derived forms: polyps

Type of: cnidarian, coelenterate, growth

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

Encyclopedia: Polyp