λίθος (líthos|lee'-thos|noun|stone)
[Grk] λίθος LN: 2.23, 2.24, 2.29 GK: G3345 Hebrew: אֶבֶן‎, גָּזִית‎, כֶּתֶם‎, מַצֵּבָה‎, סָקַל‎, פָּז‎, פָּנִין‎, פָּנִין‎, צְרֹור‎, רָגַם‎
Derivation: apparently a primary word;
Strong's: a stone (literally or figuratively)
KJV: --(mill-, stumbling-)stone.