nervous or tendinous fibers passing in the form of an arch from one structure to (usually) an immediately adjacent structure, such as gyri in the cerebral cortex. See: arcuate fibers of cerebrum, external arcuate fibers, internal arcuate fibers.
ar·cu·ate fi·bers
(ahrk'yū-ăt fī'bĕrz) Nervous or tendinous fibers passing in the form of an arch from one part to another. FinancialSeeFiber