catalexis

noun

cat·​a·​lex·​is ˌka-tə-ˈlek-səs 

plural catalexes ˌka-tə-ˈlek-ˌsēz 

: omission or incompleteness usually in the last foot of a line in metrical verse

Word History

Etymology

New Latin, from Greek katalēxis close, cadence, from katalēgein

First Known Use

1830, in the meaning defined above