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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.
1 In physical chemistry, saturation is the point at which a solution of a substance can dissolve no more of that substance and additional amounts of it will appear as a separate phase (as a precipitate if solid or as effervescence or inclusion if gaseous).ee also: Saturated and unsaturated compounds. In chemistry, saturation (from the Latin word saturare, meaning to fill) has diverse meanings, all based on reaching a maximum capacity.