au fait (Fr.). Well acquainted with; expert.
aurea mediocritas (L.). The golden or happy mean.
au revoir (Fr.). Adieu until we meet again.
autant d'hommes, autant d'avis (Fr.). So many men, so many minds.
aut Cæsar aut nullus (L.). Either Cæsar or nobody.
aut vincere aut mori (L.). Either to conquer or to die; death or victory.
Baccalaureus in artibus (L). Bachelor of Arts (B.A.).
beau ideal (Fr.). An ideal beauty.
beau monde (Fr.). The fashionable world.
bel esprit (Fr.). A person of wit or genius; a brilliant mind.