Having nerves; especially, having nerves of a specified character. SpecificallyIn botany, ribbed: applied to leaves having fibrovascular bundles ramifying through them, like veins or nerves in the animal structure. Also nervous. See nervation.In entomology, having nervures or veins: applied to the wings of insects.In heraldry, having nerves, as a leaf: said of a leaf when the nerves and veins are of a different tincture from the rest of the leaf.