hyacinth + -ine
hyacinthine (comparative more hyacinthine, superlative most hyacinthine)
- Of the colour of a hyacinth.
- 1674, John Milton, Paradise Lost, Book IV, lines 300-303, 
- His fair large front and eye sublime declared / Absolute rule; and hyacinthine locks / Round from his parted forelock manly hung / Clustering, but not beneath his shoulders broad:
- vocative masculine singular of hyacinthinus