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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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Origin and Etymology of spinel
Italian spinella, diminutive of spina thorn, from Latin
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See words that rhyme with spinel Britannica.com: Encyclopedia article about spinel
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