The degree to which a material (e.g. a polymer or a rock) is crystalline(noun)
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Use "crystallinity" in a sentence
"The reinforcement can either be an added material, such as metal or ceramic fibers, or internally created by precipitating ductile dendrites within the BMG, yielding partial crystallinity."
"Sandalwood and frankincense in the base enhance both the fresh-green-dry and the creamy-ripe-languid sides of the rose, its fragile crystallinity and its heady intensity."
"The pattern of crystallinity, however, is far from straight."