striation

UK: /straɪˈeɪʃən/ US: (strī ā′shən)

WordReference Random House Unabridged Dictionary of American English © 2025

stri•a•tion  (strī ā′shən), n. 

1. Anatomy striated condition or appearance.
2. Anatomy, Cell Biology a stria;
   one of many parallel striae.
3. Geology any of a number of scratches or parallel grooves on the surface of a rock, resulting from the action of moving ice, as of a glacier.
4. Anatomy, Cell Biology [Cell Biol.] any of the alternating light and dark crossbands that are visible in certain muscle fibers, esp. of voluntary muscles, and are produced by the distribution of contractile proteins.

• striate + -ion 1840–50

Collins Concise English Dictionary © HarperCollins Publishers::

striation / straɪˈeɪʃən/ noun

1. an arrangement or pattern of striae
2. the condition of being striate
3. another word for stria1