The present participle of crystallise; the ongoing process of forming crystals or becoming crystalline.
From crystallise + -ing (present participle). British spelling variant of 'crystallizing,' maintaining the 's' instead of 'z' in continuous form.
Right now, as you read this, crystallising is happening everywhere—in your freezer, in cave stalactites, and even in the Earth's mantle where molten rock slowly forms new crystals.
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