frenum

noun

fre·​num ˈfrē-nəm 

plural frenums or frena ˈfrē-nə 

: frenulum sense 1

Word History

Etymology

New Latin, from Latin, bridle, reins, and bit; probably akin to Latin frendere to grind — more at grind

First Known Use

1741, in the meaning defined above

Medical Definition

frenum

noun

fre·​num ˈfrē-nəm 

plural frenums or frena -nə 

: frenulum