Postulatio actionis
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
In Roman law. The demand of an action ; the request made to the prætor by an actor or plaintiff for an action or formula of suit; corresponding with the application for a writ in old English practice. Or, as otherwise explained, the actor's asking of leave to institute his action, on appearance of the parties befoie the orætor. Halhtax, Civil Law, b.
3, c. 9, no. 12.