plural lavabos
Definition of lavabo
1
often capitalized
: a ceremony at Mass in which the celebrant washes his hands after offering the oblations and says Psalm 25:6–12 (Douay Version)
2a
: a washbasin and a tank with a spigot that are fastened to a wall
b
: this combination used as a planter
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Merriam-Webster unabridged
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Time Traveler for lavabo
The first known use of lavabo was circa 1858
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