Lewis & Short

testācĕus (TESTACIVS, Inscr. Orell. 4353), a, um, adj. [testa].

  1. I. 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.
    1. B. Subst.: testācĕum, i, n., a kind of brick, Plin. 36, 23, 55, § 176; Pall. Mai. 11, 3.
  2. II. Covered with a shell, testaceous: omnia, shell fish, testacea, Plin. 32, 5, 20, § 58; cf. operimentum, id. 11, 37, 55, § 153 (Jahn, testeus).
  3. III. Brick-colored: gemmae, Plin. 37, 7, 31, § 106: pira, id. 15, 15, 16, § 55.