Strong's:ἐλεφάντινος elephantine, i.e. (by implication) composed of ivoryDerivation: from ἔλεφας (an "elephant");KJV Usage: of ivory.
TBESG:ἐλεφάντινοςmade of ivoryG:A ἐλεφάντινος, -η, -ον (< ἐλέφας, ivory), [in LXX for שֵׁן ;] of ivory: Rev.18:12.† (AS)
ἐλεφάντινος elephantinos el-ef-an'-tee-nos From ἔλεφας elephas (an “elephant”); elephantine, that is, (by implication) composed of ivoryKJV Usage: of ivory.