ŏpācus, a, um, adj.
I In the shade , shaded , shady (class.): opaca vocantur umbrosa, Fest. p. 185 Müll.: ripa, Cic. Leg. 1, 5, 15: frigus, shady coolness , cool shade , Verg. E. 1, 53: vallis, Hor. Ep. 1, 16, 5.— Comp. : locus umbrā opacior, Plin. Ep. 5, 6, 25.— Sup. : opacissima nemorum pascua, Col. 6, 22.— Neutr. absol. : colores, qui in opaco clarius micant, in the shade , Plin. 10, 20, 22, § 43.—So in plur. with gen.: per opaca locorum, through shady places , Verg. A. 2, 725; 6, 633.—
B Transf.
1 Darkened as if by shades, dark , obscure (poet. and in post-class. prose): nox, Verg. A. 4, 123: domus Cyclopis, id. ib. 3, 619: nubes, Ov. A. A. 2, 619: mater, i. e. the earth , id. M. 2, 274: crepuscula, in the lower regions , id. ib. 14, 122: vetustas, Gell. 10, 3, 15: mons, Vulg. 1 Reg. 23, 14.—*
2 Bushy , thick : barba, Cat. 37, 19.—
II That gives or casts a shade , shady (poet.): nemus, Verg. A. 8, 107: ilex, id. ib. 11, 851: herba, Ov. M. 3, 438.