striation
noun
stri·a·tion
strī-ˈā-shən
1
a
: the fact or state of being striated
b
: arrangement of striations or striae
2
: a minute groove, scratch, or channel especially when one of a parallel series
3
: any of the alternate dark and light cross bands of a myofibril of striated muscle
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Merriam-Webster unabridged
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