Dictionary entry

κρύσταλλος

G. Abbott-Smith's A Manual Greek Lexicon of the New Testament

κρύσταλλος, -ου, ὁ

(< κρύος, frost), [in LXX: Jb 38:29, Ps 147:6, (17), Ez 1:22 (קֶרַח), etc.;]

crystal: Re 4:622:1.†