Etymology

frenulum

F4R1E1N1U1L1U1M3

Today it means: 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. Full definition →

New Latin frēnulum
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The story

  1. New Latin · borrowed fromfrēnulum
  2. English todayfrenulum

Borrowed from New Latin frēnulum, diminutive of frēnum (“a bridle, curb, bit”).

Etymology from Wiktionary, CC BY-SA 4.0.