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medical 医学 a small mass of cells that develops inside the body, especially in the nose, that is caused by disease but is not usually harmful 息肉；（尤指）鼻息肉 a small and very simple sea creature with a body like a tube in shape 水螅（体）；（水螅型）珊瑚虫
Word Originlate Middle English (in sense (1)): from Old French polipe, from Latin polypus, from a variant of Greek polupous ‘cuttlefish, polyp’, from polu- ‘many’ + pous, pod- ‘foot’. Sense (2) dates from the mid 18th cent.