Ad valorem, according to the value
A fortiori, all the more surely
Alma mater, fostering mother
Alter idem, another precisely similar
Anno Domini, in the year of our Lord
A posteriori, from facts back to principles
A priori, from principles to facts
Argumentum ad hominem, an appeal to interests rather than to reason
Bona fide, in good faith
Cui bono, who benefits by it