the.com/microvillus

means A microvillus is one of the tiny, finger-like projections on the surface of certain cells—especially in the intestine—that increases surface area for absorbing nutrients.

from From micro- (Greek, 'small') plus villus (Latin for 'shaggy hair' or 'tuft')—the same villus that gives us 'velvet.' Biologists had already used 'villi' for the finger-like folds lining the intestine; when microscopes revealed even tinier hair-like bristles on the surface of those villi's own cells, 'microvillus' was the natural next step down in scale—hairs upon hairs, shag upon shag.