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quā̆drŭplus (quā̆drŭpŭlus, Plaut. Truc. 4, 2, 49 Fleck.), a, um, adj. [quattuor], fourfold, quadruple (rare as adj.): strena, Suet. Tib. 34: numerus, Macr. Somn. Scip. 1, 19, 21; 2, 1, 19.
Subst.: quā̆drŭplum, i, n., a fourfold amount, four times as much, quadruple (class.): furem dupli condemnari, feneratorem quadrupli, to a fourfold penalty, Cato, R. R. prooem.: judicium in aratorem in quadruplum dare, to sentence the cultivator, who did not deliver the quantity of grain fixed by law, to pay four times as much, Cic. Verr. 2, 3, 13, § 34; Plin. Pan. 40: elephanto pulmo quadruplo major bubulo, four times as large, Plin. 11, 37, 79, § 203: actio quadrupli, Dig. 4, 2, 14; 2, 8, 5; Gai. Inst. 3, 192; 4, 4: in quadruplum damnari, Dig. 48, 13, 13: si quid aliquem defraudavi reddo quadruplum, Vulg. Luc. 19, 8.