A coil or twist, especially of the brain's surface; also a complicated or intricate arrangement or pattern.
From Latin convolutio, derived from convolvere (to roll together). The word developed two related meanings: the literal physical coils (especially brain folds) and the figurative sense of complexity or intricacy.
Your brain's convolutions aren't just decoration—those wrinkles and folds massively increase the surface area available for neurons, packing more thinking power into your skull. Every fold is extra brainpower!
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