nounpl. -·lums or -·la
- a small frenum
- Zool. 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
Origin of frenulumModL, diminutive of frenum: see frenum
- Anatomy A small frenum.
- Entomology A bristly structure on the hind wings of certain moths and butterflies that holds the forewings and hind wings together during flight.
Origin of frenulumNew Latin frēnulum diminutive of Latin frēnum bridle ; see frenum .
(plural frenula or frenulums)
From Latin frēnulum, diminutive of frēnum.