Extended Strong's Greek Lexicon (Abbott-Smith based)
millstone
Usage: μύλος, -ου, ὁ [in LXX for רֵחֶה, Num.11:8, Deu.24:6, al. ;] __1. = μύλη, a mill (Strab., Plut., LXX) : Mat.24:41, Rev.18:22. __2. a mill-stone (Anth.) : Rev.18:21 (T); μ. ὀνικός, Mat.18:6, Mrk.9:42 (see Swete, in l).† (AS)