(Western Christianity) A liturgical chant recited as part of the Mass, beginning with those words, or the music to which it is set.

A tree, Vitex agnus-castus, formerly believed to preserve chastity.

plural of Agnus Dei

plural of agnus castus

(organic chemistry) An organic compound found in Vitex agnus-castus; the ester of aucubin and p-hydroxybenzoic acid.