a small vascular growth on the surface of a mucous membrane
source: WordNet 3.0
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.
source: WordNet 3.0
One of the feeding or nutritive zooids of a hydroid or coral.
