- polyp, polypus - a small vascular growth on the surface of a mucous membrane
--1 is a kind of growth
--1 has particulars: adenomatous polyp; sessile polyp; pedunculated polyp - polyp - one of two forms that coelenterates take e.g. a hydra or coral: usually sedentary and has a hollow cylindrical body usually with a ring of tentacles around the mouth
--2 is a kind of coelenterate, cnidarian
--2 is a member of Cnidaria, phylum Cnidaria, Coelenterata, phylum Coelenterata