antibacchius

noun, plural an·ti·bac·chi·i [an-ti-buh–kahy-ahy, –kahy-ee] /ˌæn tɪ bəˈkaɪ aɪ, -ˈkaɪ i/. Prosody.

1. a foot of three syllables that in quantitative meter consists of two long syllables followed by a short one, and that in accentual meter consists of two stressed syllables followed by an unstressed one.