Agnus Dei

noun3

1. •
   A liturgical chant recited as part of the Mass, beginning with those words, or the music to which it is set.
2. •
   A small model, picture, or heraldic representation of a lamb with a cross and sometimes a flag (usually white with a red cross).
3. •
   A bar of wax imprinted with a similar shape and blessed by the Pope.

   • The most common of these amulets was the agnus dei, a small wax cake, originally made out of paschal candles and blessed by the Pope, bearing the image of the lamb and flag. — 1971