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Webster 1913 Edition

Noun.

A basin, or bowl, to hold water for washing one’s hands, face, etc.

washbowl ‎(plural washbowls)

a sink in a bathroom, connected to a supply of water and a drain, in which one may wash one's face and hands
a basin for washing the face and hands; a washbasin or wash-hand basin ((Britain))

a sink in a bathroom, connected to a supply of water and a drain

a basin for washing the face and hands