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.
(Bot.) Hardening of the cell wall by lignification.
(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. Formerly referred to as
insular sclerosis, but now usually called only
multiple sclerosis, or
[1913 Webster +PJC]
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