Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A wall of a body part, organ, or cavity.

from The Century Dictionary.

  • noun i. In anatomy and zoology:
  • noun A wall or inclosure; an envelop or investment; a body-wall; any part which inclosesor bounds a cavity: generally in the plural: as,the thoracic or abdominal parietes (that is,the walls of the chest or belly.
  • noun In Cirripedia, the free middle part of the shell, as distinguished from the lateral wings.
  • noun One of the perpendicular partitions separating the cells of a honeycomb or a wasps’ nest.
  • noun In botany, the side or wall of an ovary or capsule.
  • noun The central thickened portion of a valve of the acorn-barnacle (Balanus). The anterior overlapping edge of the valve is the ‘radius,’ the posterior underthrust edge the ‘ala.’

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Zoöl.) The triangular middle part of each segment of the shell of a barnacle.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun The wall of any cavity in the body.
  • noun zoology The triangular middle part of each segment of the shell of a barnacle.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun (anatomy) a layer (a lining or membrane) that encloses a structure

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[Latin pariēs, wall.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Latin pariēs ("wall of a house or room").

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