lavabo
/ləˈveɪbəʊ/
A ritual involving the washing of one's hands at a church's offertory before handling the Eucharist.
The small towel used to dry the priest's hands following the ritual.
A washbasin, particularly the one in a church used in the ritual.
A trough used for washing at some medieval monasteries.
A lavatory: a room used for urination and defecation.