a strong bristle or group of bristles on the hind wing of some moths and other insects, by which the forewing and hind wing are united during flight
2.
a small fraenum
Word origin
C18: New Latin, diminutive of Latin frēnum bridle
frenulum in American English
(ˈfrɛnjuləm; ˈfrɛnjələm)
nounWord forms: pluralˈfrenulums or ˈfrenula (ˈfrɛnjʊlə)
1.
a small frenum
2. Zoology
a stiff bristle or group of bristles extending from the hind wing of some moths and interlocking with a structure on the front wing, linking the wings together in flight