striation

1. (countable)One of a number of parallel grooves and ridges in a rock or rocky deposit, formed by repeated twinning or cleaving of crystals.

   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

2. (countable)One of a number of parallel scratch lines in rock outcrops, formed when glaciers dragged rocks across the landscape.

3. (countable, uncountable)The action of marking with a stria.

   Streifen

4. (countable, uncountable)The result of being marked with a stria.

   Streifung

5. (countable, uncountable)A parallel series of small grooves, channels, or impressions typically within a metal roof panel used to help reduce the potential for oil-canning.

regular