Lewis Short
(adjective) : testācĕus (TESTACIVS, Inscr. Orell. 4353), a, um, testa.
* Consisting of bricks or tiles, brick-, tile-: structura,Vitr. 2, 8 fin.: pavimentum, id., 7, 4, fin.: Col. 1, 6, 13: opus,Plin. Ep. 10, 37, 2; 10, 39, 4: MONVMENTVM,Inscr. Orell. 4354.
* Subst.: testācĕum, i, n., a kind of brick, Plin. 36, 23, 55, § 176; Pall. Mai. 11, 3.
* Covered with a shell, testaceous: omnia,shell fish, testacea,Plin. 32, 5, 20, § 58; cf. operimentum,id. 11, 37, 55, § 153 (Jahn, testeus).
* Brick-colored: gemmae,Plin. 37, 7, 31, § 106: pira,id. 15, 15, 16, § 55.
Charlton T. Lewis, Charles Short, A Latin Dictionary