ὑακίνθινοςhyakínthinos

of hyacinth, hyacinthine (see ὑάκινθος), "doubtless meant to describe the blue smoke of a sulphurous flame": Revelation 9:17 (Hom., Eur., and elsewhere).

Greek (New Testament) · G5191

Same root

ὑάκινθοςhyákinthos · G5192the "hyacinth" or "jacinth", i.e. some gem of a deep blue color, probably the zirkon

Where it appears

Appears 1 times in the Bible.

Revelation 9:17 And in my vision, I saw the horses and the riders sitting on them. The riders wore armor that was fiery red and dark blue and yellow. The horses had heads like lions, and fire and smoke and burning sulfur billowed from their mouths.

Source: G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922), public domain.