Source : Webster's Revised Unabridged Dictionary (1913)

Stria \Stri"a\, n.; pl. {Stri[ae]}. [L., a furrow, channel,
   hollow.]
   1. A minute groove, or channel; a threadlike line, as of
      color; a narrow structural band or line; a striation; as,
      the stri[ae], or groovings, produced on a rock by a
      glacier passing over it; the stri[ae] on the surface of a
      shell; a stria of nervous matter in the brain.

   2. (Arch.) A fillet between the flutes of columns, pilasters,
      or the like. --Oxf. Gloss.

Source : WordNet®

stria
     n 1: any of a number of tiny parallel grooves such as: the
          scratches left by a glacier on rocks or the streaks or
          ridges in muscle tissue [syn: {striation}]
     2: a stripe of contrasting color; "chromosomes exhibit
        characteristic bands" [syn: {band}, {striation}]
     [also: {striae} (pl)]