bit (for a horse's mout Copy link • bit (for a horse's mouth); frēnum; usu. in plu., frēna or frēni: the horse submits to the b., equus frenum recipere solet, Cic.: Hor.: to take the b. in one's teeth (i. e. to resist), frenum mordere, Cic.: the sounding b., freni sonantes, Virg.: a jagged kind of b. (used for hard-mouthed horses), frena lupata (also simply lupata, Virg., and lupus, Ov.): Hor.