Definition of hyacinth
1a
: a precious stone of the ancients sometimes held to be the sapphire
b
: a gem zircon or hessonite
2a
: a plant of the ancients held to be a lily, iris, larkspur, or gladiolus
b
: a bulbous perennial herb (Hyacinthus orientalis) of the lily family that is native to the Mediterranean region but is widely grown for its dense spikes of fragrant flowers — compare grape hyacinth, water hyacinth
3
: a light violet to moderate purple
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Merriam-Webster unabridged
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Time Traveler for hyacinth
The first known use of hyacinth was in 1553
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