Q / quā^drĭvĭum
noun

quā^drĭvĭum

gen. quā^drĭvii · gender neuter · decl. 2nd
quattuor-via.
a place where four ways meet; a crossway; cross-road
Lit., a place where four ways meet, a crossway, cross-road: in quadriviis et angiportis, Cat. 58, 4; so Juv. 1, 63: DII, the tutelar gods of cross-roads, Inscr. Grut. 84, 5; 1015, 1; Inscr. Rein. col. 1, n. 14.—
the assemblage of the four mathematical sciences by extension
Transf., the assemblage of the four mathematical sciences (arithmetic, music, geometry, and astronomy), Boëth. Arithmet. 1, 1.