[L., a. Gr. Βακχεῖος (sc. ποίς).] A metrical foot of three syllables, one short and two long.
1589. Puttenham, Eng. Poesie (Arb.), 134. For your foote bacchius of a short and two long ye haue rĕnoūncīng, rĕpēntānce, ĕnūrīng.
1870. Jebb, Sophocles Electra (ed. 2), 49/2. A bacchius (ος ᾱμφᾱκ) replacing the molossus.