quā̆drīmātus, ūs, m. [quadrimus],
the age of four years (post-Aug.): extra quadrimatum, Plin. 19, 11, 58, § 181: ante quadrimatum, id. 8, 45, 70, § 176: dum quadrimatum agant, Col. 7, 9, 2; 9, 1, 7.