a. and sb. Med. [ad. mod.L. antephialticus (Hoffmann, a. 1740), f. Gr. ἀντί against + ἐφιάλτ-ης nightmare: see -IC.]
A. adj. Good against the nightmare. B. sb. A medicinal agent of this nature.
[1811. Hooper, Med. Dict., Antephialtica, medicines which prevent the night-mare].
1853. Mayne, Exp. Lex., Antephialtic, opposed to, or curative of ephialtes or night-mare.