Frenulum
Small fold of tissue that secures or restricts the motion of a mobile organ in the body
Frenulum
A frenulum (; from Latin frēnulum 'little bridle', the diminutive of frēnum; pl. frenula), also called a frenum (; pl. frena), is a small fold of tissue that secures the motion of a mobile organ in the body.
Read on Wikipedia · Image Henry Vandyke Carter, Public domain
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