The Collaborative International Dictionary
Lazar house
Lazar \La"zar\, n. [OF. lazare, fr. Lazarus the beggar. Luke
xvi. 20.]
A person infected with a filthy or pestilential disease; a
leper.
--Chaucer.
Like loathsome lazars, by the hedges lay.
--Spenser.
Lazar house a lazaretto; also, a hospital for quarantine.
Wiktionary
lazar house
n. A place to quarantine leprous people.