WASHBOWL
washbasin, handbasin, washbowl, lavabo, wash-hand basin
(noun) a basin for washing the hands (‘wash-hand basin’ is a British expression)
washbasin, basin, washbowl, washstand, lavatory
(noun) a bathroom sink that is permanently installed and connected to a water supply and drainpipe; where you can wash your hands and face; “he ran some water in the basin and splashed it on his face”
Source: WordNet® 3.1
Etymology
Noun
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 ((British))
Source: Wiktionary
Wash"bowl`, n.
Definition: A basin, or bowl, to hold water for washing one's hands, face,
etc.
Source: Webster’s Unabridged Dictionary 1913 Edition