polyp

noun

1. a small vascular growth on the surface of a mucous membrane

   noun.state

   Synonyms polypus

   Source: WordNet 3.0

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

   noun.animal

   Examples

   In some species of coelenterate, polyps are a phase in the life cycle that alternates with a medusoid phase.

   Source: WordNet 3.0

3. One of the feeding or nutritive zooids of a hydroid or coral.

   noun

   Source: webster1913