Lewis & Short

praesentārius, a, um, adj. [praesens], that is at hand, ready, quick, present (ante- and post-class. for praesens): id quod mali (haruspices) promittunt, praesentarium est (opp.: pro spisso evenit), happens immediately, Plaut. Poen. 3, 5, 47: argentum, ready money, id. Most. 2, 1, 14; id. Trin. 4, 3, 74: venenum, that operates instantly, App. M. 10, p. 240; Gell. 7 (6), 4, 1.