alcaic
adjective
al·ca·ic al-ˈkā-ik 
often capitalized
: relating to or written in a verse or strophe marked by complicated variation of a dominant iambic pattern
alcaic noun often capitalized
Word History
Etymology
borrowed from Late Latin Alcaicus, borrowed from Greek Alkaïkós "of Alcaeus" (Greek poet of Lesbos, flourished ca. 600 b.c., credited with introducing such a verse form), from Alkaîos + -ikos -ic entry 1
First Known Use
1631, in the meaning defined above