crew neck

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a round neckline, as on a sweater, fitting close around the base of the neck

See crew neck in American Heritage Dictionary 4

noun

A round close-fitting neckline.
often crew·neck (kro͞oˈnĕkˌ) A garment, especially a sweater, with such a neckline.

Origin:

Origin: From the wearing of similarly styled sweaters by rowers

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