The headword, perhaps (though not demonstrably) extracted from the quotation given, is aorist passive participle, masculine nominative singular, of the verb e)kbakxeu/w. (For the use of this verb, which literally means to drive into a Bacchic frenzy, see e.g. Euripides, Bacchae 1296 (web address 1); and cf. beta 53, beta 54.). For the phenomenon of bakcheia in general, see Ustinova 2018: 169-216.
[1] Same glossing (i.e. by the corresponding participle of the verb e)kmai/nw) in other lexica, and cf. the scholia to Plato, Republic 561A. For the use of the verb in association with Bacchus, see Euripides, Bacchae 36 (web address 2). For a discussion of the concept of mani/a in Ancient Greek literature, see chapter 3 ("The Blessings of Madness") of Dodds, below.
[2] Roman Emperor of Pannonian descent (b. 328, emperor 364-378); see omicron 764 with notes and references.
[3] Quoted from an unidentifiable historical narrative (but attributed to Eunapius by Tittmann [Blockley, Eunapius fr. 44.[5]]), this probably refers to the Battle of Adrianople on August 9, 378; the Roman army under Valens was defeated by the Goths and the emperor himself was killed. For an account of the battle, see Ammianus Marcellinus, Historiae 31.12-13.