n. [ L. enervatio: cf. F. énervation. ] 1. The act of weakening, or reducing strength. [ 1913 Webster ]

2. The state of being weakened; effeminacy. Bacon. [ 1913 Webster ]

n. [ Cf. F. innervation. ] 1. The act of innerving or stimulating. [ 1913 Webster ]

2. (Physiol.) Special activity excited in any part of the nervous system or in any organ of sense or motion; the nervous influence necessary for the maintenance of life, and the functions of the various organs. [ 1913 Webster ]

3. (Anat.) The distribution of nerves in an animal, or to any of its parts. [ 1913 Webster ]

n. The arrangement of nerves and veins, especially those of leaves; neuration. [ 1913 Webster ]

The outlines of the fronds of ferns, and their nervation, are frail characters if employed alone for the determination of existing genera. J. D. Hooker. [ 1913 Webster ]