Polyp

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polyp

1. (Science: pathology) growth, usually benign, protruding from a mucous membrane.

2. (Science: plant biology) The sessile stage of the Cnidarian life cycle, the cylindrical body is attached to the substratum at its lower end and has a mouth surrounded by tentacles bearing nematocysts at the upper end, hydra and the feeding polyps of the colonial Obelia are examples.

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