I.num. ord. adj. [triginta], the thirtieth: “idem tricesimo post die feci,” Cic. Fam. 12, 2, 1: “tertius et tricesimus annus,” id. Sen. 6, 19: “sexto tricesimo anno post,” id. Off. 2, 8, 29: legio quinta tricesima, Galb. ap. Cic. Fam. 10, 30, 1: “tricesimo sexto anno,” Liv. 3, 30, 7: “tricesimum annum agens,” id. 40, 6, 4: “tricesimo die,” Curt. 5, 6, 19: “tricesima sabbata,” Hor. S. 1, 9, 69: “bis trigesimus consul instat,” Mart. 1, 16, 3. — Hence, subst.: Trīcēsĭmae , ārum, f., the name of a town in Gallia Belgica on the Rhine, Amm. 18, 2, 4.
trīcēsĭmus (less freq. trīgēsĭmus , Mart. 1, 16, 3; 10, 103, 7; Just. 12, 15), a, um,