I. Lit., of pitch, Lucr. 6, 135.—
II. Transf., black as pitch, pitch-black: “piceā crassus caligine,” Verg. G. 2, 308: “turbine fumans piceo,” id. A. 3, 573: “lumen,” id. ib. 9, 75: “nubes,” Ov. M. 11, 549: “caelum,” Val. Fl. 2, 507: “nimbus,” id. 2, 115: “oves,” id. 3, 439: “dentes,” Mart. 2, 41, 7: “imber piceus crassusque,” Plin. 16, 33, 61, § 143: “coacti aëris caligo picea,” Ambros. in Luc. 7, 20.