trīgārĭus — Lewis & Short
trīgārĭus, a, um, adj.triga,
I of or belonging to a triga; used only as subst.
I trīgārĭus, ii, m., one who drives a threehorse chariot, Plin. 28, 17, 72, § 238; 29, 1, 5, § 9.—
II trīgārĭum, ii, n.
A A place in which trigae (and horses in general) are trained and exercised, Plin. 37, 13, 77, § 202; cf.: trigarium to/pos, o(/pou i(/ppoi gumna/zontai, Gloss. Philox.—
2 As a nom. propr., a place or square in Rome in the ninth region, Inscr. Orell. 4266.—
B (Acc. to triga, II.) The number three, Mart. Cap. 7, § 733; 9, § 895.