noun
also frae·num ˈfrēnəm
( plural fre·nums -nəmz ; or fre·na -nə)
Etymology: Latin, literally, bridle; akin to Latin fretus relying, firmus firm — more at firm
1. : a connecting fold of membrane serving to support or restrain (as the underside of the tongue)
2. : a fold or ridge extending from the scutellum of an insect to the base of each anterior wing
3. : a stripe of color on the cheek