polyp

coelen tacles aroun

polyp n.

珊瑚蟲(水螅型), 息肉

英英解釋:名詞polyp:
1. a small vascular growth on the surface of a mucous membrane
同義詞：polypus
2. 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