Of a yellowish colour, as in yellow zircon.(adjective)
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Use "hyacinthine" in a sentence
"Both have proposed an originally perfect being with hyacinthine locks, from whose type all the subsequent humans are degradations physical and moral."
"But I SURE AS HELL want to see the lovely auburn, hyacinthine Judith replete with pineapple, a la CARMEN MIRANDA"
"So saying, he made the king turn round, and I contemplated his hyacinthine locks, and gently stroked them."