striae

(noun) 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. Synonyms: stria, striation.

(noun) a stripe or stripes of contrasting color. Synonyms: band, banding, stria, striation. Examples: "Chromosomes exhibit characteristic bands." "The black and yellow banding of bees and wasps."