| NOUN | substance | kyanite, cyanite | a grey or greenish-blue mineral consisting of aluminum silicate in crystalline form |
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| Meaning | A grey or greenish-blue mineral consisting of aluminum silicate in crystalline form; occurs in metaphoric rock, used as a refractory. | |
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| Synonym | cyanite | |
| Broader | mineral | Solid homogeneous inorganic substances occurring in nature having a definite chemical composition |