Webster's Revised Unabridged Dictionary · 1913

Hyacinthine

Hyacinthine , adjective

[Latin hyacinthinus, Greek {not transcribed}.]

Belonging to the hyacinth; resembling the hyacinth; in color like the hyacinth. — Milton
His curling locks like hyacinthine flowers. — Cowper
The hyacinthine boy, for whom Morn well might break and April bloom. — Emerson