• (n.) A person dwelling in, or having charge of, an infirmary, esp. in a monastic institution.
In`fir·ma'ri·an (ĭn`fẽr*mā'rĭ* a n) noun A person dwelling in, or having charge of, an infirmary, esp. in a monastic institution. 
(in a religious house) a person who nurses the sick.