Lewis & Short

† antĭdŏtum, i, n., and -us or -ŏs, i, f. (cf. Scrib. Larg. Comp. 99, 106, and passages cited there), = ἀντίδοτον (-ος), a counterpoison.

  1. I. Lit.: antidota raro, sed interdum necessaria sunt, Cels. 5, 23; Phaedr. 1, 14, 3: se antidotum daturum, Quint. 7, 2, 25; so Suet. Calig. 23; id. Ner. 34 al.: antidotus, Gell. 17, 16; Dig. 18, 1, 35.
    Sometimes, in gen., an antidote, remedy, Spart. Hadr. 23.
  2. II. Trop.: antidotum adversus Caesarem, Suet. Calig. 29.