striation

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The state of being striated or having striae.
• noun One of a number of parallel lines or scratches on the surface of a rock that were inscribed by rock fragments embedded in the base of a glacier as it moved across the rock.
• noun The form taken by striae.
• noun A stria.

from The Century Dictionary.

• noun The state of being striated; a striate condition or appearance; striature; also, one of a set of striæ; a stria.
• noun In geology, grooves, flutings, and scratches made on the surfaces of rocks by the passage over them of bodies of ice: a result frequently observed along the sides of existing glaciers, and in regions which were formerly occupied by ice.
• noun In mineralogy, fine parallel lines on a crystalline face, commonly due to the oscillatory combination of two crystalline forms.

from the GNU version of the Collaborative International Dictionary of English.

• noun The quality or condition of being striated.
• noun A stria.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun countable (mineralogy) One of a number of parallel grooves and ridges in a rock or rocky deposit, formed by repeated twinning or cleaving of crystals.
• noun countable (geomorphology) One of a number of parallel scratch lines in rock outcrops, formed when glaciers dragged rocks across the landscape.
• noun The action of marking with a stria.
• noun The result of being marked with a stria.
• noun roofing a parallel series of small grooves, channels, or impressions typically within a metal roof panel used to help reduce the potential for oil-canning.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• 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
• noun a stripe or stripes of contrasting color