catalectic

adjective

cat·​a·​lec·​tic ˌka-tə-ˈlek-tik 

: lacking a syllable at the end of a line in metrical verse or ending in an incomplete foot

catalectic noun

Word History

Etymology

Late Latin catalecticus, from Greek katalēktikos, from katalēgein to leave off, from kata- + lēgein to stop — more at slack

First Known Use

1589, in the meaning defined above