Meaning of Sister of Mercy

Sis'ter of Mer'cy

Pronunciation: [key]
— Rom. Cath. Ch. Rom. Cath. Ch.
  1. a member of a congregation of sisters founded in Dublin in 1827 by Catherine McAuley (1787–1841) and engaged chiefly in works of spiritual and corporal mercy.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.