stria

1. A thin, narrow groove or channel.
2. A thin line or band, especially one of several that are parallel or close together: a characteristic stria of contractile tissue.

[Latin.]

1. A fillet.
2. A rib, esp. one repeated to give texture.

1. A thin, narrow groove or channel.
2. A thin line or band, especially one of several that are parallel or close together.
3. A thin line, band, stripe, or streak distinguished from the tissue in which it is found; a striation.

Pl. striae [L.]
1. a streak or line.
2. a narrow, bandlike structure; longitudinal collections of nerve fibers in the brain.

• atrophic s., striae atrophicae — atrophic, pinkish or purplish, scarlike lesions in the skin, later becoming white, due to weakening of elastic tissues. Seen in association with canine Cushing's syndrome.
• habenular s. — a bundle of nerve fibers connecting the olfactory centers with the habenular nuclei.
• s. mallearis — a light band visible through the tympanic membrane when it is examined with an otoscope; is the handle of the malleolus.
• s. medullares — bundles of white fibers across the floor of the fourth ventricle.

The noun has 2 meanings:

Meaning #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
  Synonym: striation

Meaning #2: a stripe of contrasting color
  Synonyms: band, striation