Ridge of Tissue, E.g. Fold of Skin Beneath Tongue

This page is the CodyCross answer for the clue below from Underground Worlds, Group 2171, Puzzle 4 (Glacier Tours).

Question is: Ridge of Tissue, E.g. Fold of Skin Beneath Tongue

and the answer is: FRENULUM

Word Meaning:

FRENULUM — (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.

Definitions from Wiktionary.