A rough or harsh quality; a point or spot of roughness on a surface.
From Latin 'asper' (rough) + suffix '-ite' (forming nouns). The term emerged in technical and scientific contexts to denote microscopic rough spots, particularly in materials science.
In nanotechnology, engineers measure asperites—tiny rough peaks on supposedly smooth surfaces—because even 'smooth' metal is covered with microscopic bumps that affect how things slide together.
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