variants:
or spinelle
Definition of spinel
1
: a hard crystalline mineral consisting of an oxide of magnesium and aluminum that varies from colorless to ruby red to black and is used as a gem
2
: any of a group of minerals that are essentially oxides of magnesium, ferrous iron, zinc, or manganese
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Merriam-Webster unabridged
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Time Traveler for spinel
The first known use of spinel was in 1528
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