tridymite /tridˈi-mīt/ (mineralogy)

An orthorhombic form of silica, in hexagonal scales, often combined in threes

• grading system
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• gradini
• gradino
• gradins
• gradiometer
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• gradual
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• gradualist
• gradualistic
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• graduality
• gradually
• gradualness
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• graduand
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• graduate
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• graduated pension scheme
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