senarius

noun

se·​nar·​i·​us si-ˈner-ē-əs 

plural senarii si-ˈner-ē-ˌī 

-ē-ˌē

: a verse consisting of six feet especially in Latin prosody

Word History

Etymology

Latin, from senarius consisting of six each, from seni six each, from sex six — more at six

First Known Use

1540, in the meaning defined above