||Scle*ro"sis (?), n. [NL., fr. Gr.
(??, fr. sklhro`s hard.] 1.
(Med.) Induration; hardening; especially, that form of
induration produced in an organ by increase of its interstitial
connective tissue.
2. (Bot.) Hardening of the cell wall by
lignification.
Cerebro-spinal sclerosis (Med.), an
affection in which patches of hardening, produced by increase of the
neuroglia and atrophy of the true nerve tissue, are found scattered
throughout the brain and spinal cord. It is associated with complete
or partial paralysis, a peculiar jerking tremor of the muscles,
headache, and vertigo, and is usually fatal. Called also multiple,
disseminated, or insular, sclerosis.