Striation

Origin

stria + -tion? or from striate

Full definition of striation

Noun

1. (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.
2. (countable, geomorphology) One of a number of parallel scratch lines in rock outcrops, formed when glaciers dragged rocks across the landscape.
• 2012, John Branch, Snow Fall : The Avalanche at Tunnel CreekThe energy raised the temperature of the snow a couple of degrees, and the friction carved striations high in the icy sides of the canyon walls.
3. The action of marking with a stria.
4. The result of being marked with a stria.
5. (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.