Dictionary entry

ὑακίνθινος

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

ὑακίνθινος, -η, -ον

(< ὑάκινθος), [in LXX for תַּחַשׁ, תְּכֵלֶת;]

of hyacinth, hyacinthine (v.s. ὑάκινθος), "doubtless meant to describe the blue smoke of a sulphurous flame" (Swete): Re 9:17 (Hom., Eur., al.).†