λίθος (líthoslee'-thosnounstone)
[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.