striation

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

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

From striate + -ion.

Mountains hemmed it in; their distant peaks showed black, with red and green striations of mineralized deposits. — Astounding Stories, May, 1931, Various
It was far enough from the fog-flares for the last least trace of striation to have vanished. — Astounding Stories of Super-Science January 1930, Unknown
Made of solid ivory, without striations, harder than elephant tusks, and less prone to yellowing, these teeth are in great demand. — Twenty Thousand Leagues Under the Seas: An Underwater Tour of the World, Jules Verne

stria

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