Englishfor English speakers
nucleus
Noun
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A nucleus is the center of a cell or atom.
—
The center of anything.
of
Preposition
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Made using.
It is a house of cards.
crystallization
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noun
the formation of crystals
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noun
a mental synthesis that becomes fixed or concrete by a process resembling crystal formation
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noun
(= crystal)
a rock formed by the solidification of a substance; has regularly repeating internal structure; external plane faces