Lewis & Short

† cī̆trus, i [prob. a mutilation of κέδρος, cedrus].

  1. I. The citrus, an African tree (hence Atlantis silva, Luc. 10, 144, and Massyla robora, Stat. S. 3, 3, 94), whose very fragrant wood (v. citrum) was used in making household furniture, and was prized very highly, Plin. 13, 15, 29, § 91 sq.; 13, 16, 30, § 100; Varr R. R. 3, 2, 4; Luc. 9, 428; cf. citreus, I. and citrum.
  2. II. The citrontree (also called malus Medica, Persica, etc.), Citrus Medica, Linn., whose fruit and leaves were laid between the folds of clothing to preserve it from worms; and also used as a counter-poison, Plin. 12, 3, 7, § 14 sq.; cf. id. 13, 16, 31, § 103; Cloat. and Opp. ap. Macr. S. 2, 15; Pall. Mart. 10, 16; cf. Serv. ad Verg. G. 2, 126.