polypus
  水螅,息肉
  poly·pus /ˈpɑləpəs/ 名詞
  (複polypi)息肉
  Pol·y·pus n.; pl. E. Polypuses L. Polypi
  1. Zool. Same as Polyp.
  2. Med. A tumor, usually with a narrow base, somewhat resembling a pear, -- found in the nose, uterus, etc., and produced by hypertrophy of some portion of the mucous membrane.
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  polypus
       n : a small vascular growth on the surface of a mucous membrane
           [syn: polyp]
       [also: polypi (pl)]