eyebrow has definitions from the field of zoology
1
[ noun ] (zoology) the arch of hair above each eye

Synonyms

brow supercilium

Used in print

(John Dos Passos, Midcentury....)

Brown eyes , eyebrow mustache .

(Arthur Miller, "The Prophecy," in The Best...)

Her eyebrows were definite and heavy and formed two lines moving upward toward a high forehead and a great head of brown hair that fell to her shoulders .

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