ὑακίνθος

ὑακίνθος, -ου, ό

[in LXX chiefly for תְּכֵלֶת;]

hyacinth;

(a) in cl., a flower, prob. the dark blue iris;

(b) in late writers, a precious stone of the same colour, perhaps the sapphire: Re 21:20 (Phil., FlJ, al.).†