Eph'i-äl'tēs, n.
n. [Gr. ἐφιάλτης, ἐπιάλτης, the nightmare, strictly one who leaps upon, from ἐπιάλλεσθαι, ἐφιάλλεσθαι, to spring or leap upon, from ἐπί and ἄλλεσθαι, to spring, leap.] The nightmare. Brande.
n. [Gr. ἐφιάλτης, ἐπιάλτης, the nightmare, strictly one who leaps upon, from ἐπιάλλεσθαι, ἐφιάλλεσθαι, to spring or leap upon, from ἐπί and ἄλλεσθαι, to spring, leap.] The nightmare. Brande.