altar card: Meaning and Definition of

al'tar card"

Pronunciation: [key]
— Rom. Cath. Ch. Rom. Cath. Ch.
  1. one of three cards having certain portions of the Mass printed on them, placed upright on the altar to assist the memory of the celebrant.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.