CHORIAMBUS
Etymology
Noun
choriambus (plural choriambuses or choriambi)
(poetry) A metrical foot consisting of four syllables, of which the first and last are long, and the others short; a choreus, or trochee, united with an iambus.
Source: Wiktionary
Cho`ri*am"bus, n.; pl. L. Choriambi, E. Choriambuses. Etym: [L.
choriambus, Gr. (Anc. Pros.)
Definition: A foot consisting of four syllables, of which the first and
last are long, and the other short (- ~ ~ -); that is, a choreus, or
trochee, and an iambus united.
Source: Webster’s Unabridged Dictionary 1913 Edition