The Collaborative International Dictionary of English v.0.48:

Striation \Stri*a"tion\, n.
   1. The quality or condition of being striated.
      [1913 Webster]

   2. A stria; as, the striations on a shell.
      [1913 Webster]

WordNet (r) 3.0 (2006):

striation
    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: stria, striation]
    2: a stripe or stripes of contrasting color; "chromosomes
       exhibit characteristic bands"; "the black and yellow banding
       of bees and wasps" [syn: band, banding, stria,
       striation]

Moby Thesaurus II by Grady Ward, 1.0:

61 Moby Thesaurus words for "striation":
   band, bar, belt, bezel, chamfer, chase, chink, corrugation, crack,
   cranny, craze, cross-hatching, cut, dado, dash, delineation,
   diagonal, dotted line, engraving, flute, fluting, furrow, gash,
   gouge, groove, hachure, hairline, hatching, incision, line,
   lineation, list, microgroove, rabbet, rifling, ruck, rut, score,
   scratch, slash, slit, streak, streaking, stria, striature, striga,
   striola, strip, stripe, striping, stroke, sublineation, sulcation,
   sulcus, underline, underlining, underscore, underscoring, virgule,
   well-worn groove, wrinkle