Ante meridiem.—Before noon.
Aperçu.—A brief sketch of any subject.
Appogiatura.—A note in a smaller character than the regular notes of the piece. (Music.)
Apropos (Fr. à propos.)—To the purpose.
Aqua vitæ.—Water of life; brandy.
Arbiter elegantiarum.—Master of ceremonies; an umpire in matters of taste.
Arcana imperii.—State secrets.
Arcanum.—A secret.
Argumentum ad crumenam.—An argument to the purse.
Argumentum ad fidem.—An appeal to faith.