Choriamb

In Greek and Latin poetry, a choriamb /ˈkɔːriˌæmb/ is a metron (prosodic foot) consisting of four syllables in the pattern long-short-short-long (— —), that is, a trochee alternating with an iamb. Choriambs are one of the two basic metra that do not occur in spoken verse, as distinguished from true lyric or sung verse. The choriamb is sometimes regarded as the "nucleus" of Aeolic verse, because the pattern long-short-short-long pattern occurs, but to label this a "choriamb" is potentially misleading.