polyp definition | Dictionary.com

pol⋅yp

[pol-ip]

–noun

Zoology.

a.	a sedentary type of animal form characterized by a more or less fixed base, columnar body, and free end with mouth and tentacles, esp. as applied to coelenterates.

b.	an individual zooid of a compound or colonial organism.

2.	Pathology. a projecting growth from a mucous surface, as of the nose, being either a tumor or a hypertrophy of the mucous membrane.

Origin:
1350–1400; ME polip, short for polipus nasal tumor (later, also cephalopod, now obs.) < ML, L pōlypus < dial. Gk poulýpous octopus, nasal tumor (Attic polýpous, gen. polýpodos; see poly-, -pod )

Related forms:

pol⋅yp⋅ous, adjective

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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pol·yp (pŏl'ĭp)

A coelenterate, such as a hydra or coral, having a cylindrical body and an oral opening usually surrounded by tentacles.
A usually nonmalignant growth or tumor protruding from the mucous lining of an organ such as the nose, bladder, or intestine, often causing obstruction.

[Middle English polip, nasal tumor, from Old French polipe, from Latin pōlypus, cuttlefish, nasal tumor, from Greek polupous, poulupous : polu-, poly- + pous, foot; see ped- in Indo-European roots.]
pol'yp·oid' adj.

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Polyp

Pol"yp\, n. [L. polypus, Gr. ?, ?, literally, many-footed; poly`s many + ?, ?, foot: cf. F. polype. See Poly- and Foot, and cf. Polypode, Polypody, Poulp.] (Zo["o]l.) (a) One of the feeding or nutritive zooids of a hydroid or coral. (b) One of the Anthozoa. (c) pl. Same as Anthozoa. See Anthozoa, Madreporaria, Hydroid. [Written also polype.]

Fresh-water polyp, the hydra.

Polyp stem (Zo["o]l.), that portion of the stem of a siphonophore which bears the polypites, or feeding zooids.

Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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polyp

c.1400, "nasal tumor," from L. polypus "cuttlefish," also "nasal tumor," from Gk. (Doric, Aeolic) polypos "octopus, cuttlefish," from polys "many" (see plenary) + pous "foot." Sense extended 1742 to hydras and sea anemones (earlier polypus, c.1520).

Online Etymology Dictionary, © 2001 Douglas Harper
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Main Entry: pol·yp
Pronunciation: 'päl-&p
Function: noun
: a projecting mass of swollen and hypertrophied or tumorous membrane (as in thenasal cavity or the intestine) called also polypus

Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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polyp pol·yp (pŏl'ĭp)
n.
A usually nonmalignant growth of tissue protruding from the mucous lining of an organ such as the nose, bladder, or intestine, often causing obstruction. Also called polypus.

pol'yp·oid' adj.

polyp (pŏl'ĭp) Pronunciation Key

A cnidarian in its sedentary stage. Polyps have hollow, tube-shaped bodies with a central mouth on top surrounded by tentacles. Some cnidarians, such as corals and sea anemones, only exist as polyps after their larval stage, while others turn into medusas as adults or lack a polyp stage completely. Compare medusa.
An abnormal growth extending from a mucous membrane, as of the intestine.

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