Boyd’s Bible Dictionary:
The Jewish law of retaliation permitted the deprivation of “eye for eye, tooth for tooth”
(Ex. 21:24). The principle of this law was condemned by Christ (Matt. 5:38-42). Teeth used figuratively for the inheritable quality of sin (Ezek. 18:2); “cleanness of teeth” a figure for famine (Amos 4:6); “gnashing of teeth” indicative of rage and despair (Matt. 8:12).
Strong’s Dictionary of Hebrew Words:
Transliteration:
mthall`ah
Meaning:
contr. from 3216; properly, a biter, i.e. a tooth
KJV Usage:
cheek (jaw) tooth, jaw