Transp. For mthall'ah; a grinder, i.e. Back tooth -- great tooth.
see HEBREW mthall'ah
H4459. maltaah
מְתַלְּיוֺת noun feminine plural teeth (AV RV jaw-teeth) (perhaps gnawers, see √); — teeth, incisors, late (always "" שִׁנַּיִם): construct ׳מ Job 29:17 and (of lion) Joel 1:6; suffix מְתַלְּעֹתָיו Proverbs 30:14.