Definition of polyp
1
: the sessile form of cnidarian (such as a coral or sea anemone) typically having a hollow cylindrical body closed and attached at one end and opening at the other by a central mouth surrounded by tentacles armed with nematocysts
2
: a growth projecting from a mucous membrane (as of the colon or vocal cords)
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Merriam-Webster unabridged
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Time Traveler for polyp
The first known use of polyp was in 1742
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