ĕquīrĭa, ōrum, n. [equus], the annual horse-races, held on the 27th of February and the 14th of March in the Campus Martius, in honor of Mars, Varr. L. L. 6, § 13 Müll.; Ov. F. 2, 859; 3, 519; Paul. ex Fest. p. 81, 12, and 131, 13 Müll., s. v. MARTIALIS CAMPVS, p. 96.