polyp
/ˈpɒlɪp/noun
1
- Zoology a solitary or colonial sedentary form of a coelenterate such as a sea anemone, typically having a columnar body with the mouth uppermost surrounded by a ring of tentacles. In some species, polyps are a phase in the life cycle which alternates with a medusoid phase.【动】水螅型（珊瑚虫）, 水螅（体）。比较MEDUSA.
2
- Medicine a small growth, usually benign and with a stalk, protruding from a mucous membrane【医】息肉。
派生词
polypous
adjective （限义项2）词源
late Middle English (in sense 2)： from Old French polipe, from Latin polypus （see POLYPUS）. Sense 1 dates from the mid 18th cent.