a sea anemone, coral, or related organism with a hollow cylindrical body that is attached at one end and has a central mouth surrounded by tentacles at the other
a small abnormal tissue growth, usu with a stalk, projecting from the surface of a mucous membrane
polypoid /-poyd/ adj
polypous /-pəs/ adj
[early French polype octopus, nasal tumour, via Latin polypus from Greek polypous, from poly- + pous foot]