Source : Webster's Revised Unabridged Dictionary (1913)

Paries \Pa"ri*es\, n.; pl. {Parietes}. [See {Parietes}.]
   (Zo["o]l.)
   The triangular middle part of each segment of the shell of a
   barnacle.

Source : WordNet®

paries
     n : (anatomy) a layer (a lining or membrane) that encloses a
         structure; "stomach walls" [syn: {wall}]
     [also: {parietes} (pl)]