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.