Noun
(anatomy) A small fold or ridge of tissue that supports or restrains the motion of the part to which it is attached, in particular a fold of skin beneath the tongue, or between the lip and the gum.
Humans have three oral frenulums: beneath the tongue, between the upper lip and gum, and between the lower lip and gum.
Synonym: frenum
(entomology, zootomy) A bristle or row of bristles on the edge of the hindwings of some lepidoptera which unites the wings by interlocking with a catch on the posterior part of the forewings.
Source: en.wiktionary.orgThe posterior ends (bottom) of the inner lips are usually joined across the middle line by a fold of skin, named the frenulum of labia minora or fourchette. Source: Internet
The frenulum (Latin for little bridle) is an elastic band of tissue attached by its one end to the clitoral shaft and glans and by its other end to the prepuce. Source: Internet
The tongue is tied to the floor of the mouth by a very short and thickened frenulum and this affects speech, eating, and swallowing. Source: Internet