Actio et passio, v. [causality, causes].

Actio intentionalis, [378].

Actio in distans, [395-6].

Action, immanent and transitive, [73], [369], [391-2].

Actual and potential, [52] sqq. and passim.

Actuality, goodness and perfection, [173] sqq.

Actus Purus, [54], [58].

Aegidius, [108] n.

Aeveternitas, aevum, [230].