Actio illicita in causa - Action illicitly planned (Legal term - compare with Actio libera in causa)
Actio in personam - Personal action (Legal term)
Actio in rem scripta - Real action (Legal term)
Actio libera in causa - Action free in its cause (Legal term - compare with Actio illicita in causa)
Actio pro socio - An action of partnership (Legal term - An action brought by one partner against his associates to compel them to carry out the terms of the partnership agreement)
Actio Redhibitoria - Action to rescind a sale (Legal term)
Actio semel extincta non reviviscit - Extinguished action does not revive (Legal term)
Actiones non natae non praescribunt - Actions that have not been born, are not prescribed (Legal term)
Activa tantum - Active construction (Grammartical term - Verbs that only have an active voice)
Actor incumbit probatio, reus excipiendo fit actor - The plaintiff must provide proof of the facts alleged, the defendant the exceptions presented (Legal term)
Actore non probante, reus absolvitur - When the plaintiff does not prove his case, the defendant is absolved (Legal term)
Actori incumbis onus probandi - The plaintiff must prove the case (Legal term)
Actus me invito pactus, non es meus actus - What I did against my will is not my fault (Legal term)
Actus mortis - Moment of death (Also refers to "fake death" and hypnosis)
Actus non facit reum nisi mens sit rea - The act does not make a person guilty unless the mind is also guilty (Legal term)
Acu traiectatur duo lina ducente - Thread the needle with two threads
Acuti morbi in quattuordecim diebus iudicantur - Acute illnesses are resolved in fourteen days (Medical Maxim - Hippocrates)
Ad acta - To the archives (Legal term - abbreviated as AA)
Ad acta atra peracta sunt facta atta patrata - For dark acts are prepared dark jails (Legal term in reference to serious crimes)
Ad altare Dei - To the altar of God (Ecclesiastical term)
Ad Altiora, et meliora, semper - Always the highest and the best
Ad altiora tendimus - We hung high (Motto of Superior National Institute faculty in Modern Languages "Juan Ramon Fernandez" in Argentina)
Ad Amphitruo - The Host (Title of a book by Plautus)
