noun, plural fren·u·la [fren-yuh-luh] /ˈfrɛn yə lə/.
Related formsfren·u·lar, adjective
Examples from the Web for frenulum
This process is termed the retinaculum, and serves, in conjunction with the frenulum, to lock the wings together during flight.New Zealand Moths and Butterflies|G. V. Hudson
Several of the families in this group have lost the frenulum.
Connected with this organ is a small tough membrane or ligament called the frenum which corresponds to the frenulum of the male.Self Knowledge and Guide to Sex Instruction|T. W. Shannon
In butterflies there is no frenulum, but a costal outgrowth of the 466 hindwing subserves the same function.
The hindwing carries a frenulum and has its sub-costal nervure connected with the radial by a short bar.