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Noun. 1. induration-any pathological hardening or thickening of tissue. sclerosis. disseminated multiple sclerosis, disseminated sclerosis, MS, multiple sclerosis-a chronic progressive nervous disorder involving loss of myelin sheath around certain nerve fibers.
[L.] abnormal accumulation of serous fluid in the tissues or in a body cavity; called also dropsy. See also hydramnios (hydrops amnii), hydrallantois (hydrops allantois). fetal hydrops, hydrops fetalis. gross edema of the entire body of the newborn, in hemolytic disease of the newborn.