sclerosis
noun/skləˈrəʊsɪs/
/skləˈrəʊsɪs/
[uncountable] (medical)- a medical condition in which soft tissue in the body becomes hard see also amyotrophic lateral sclerosis, multiple sclerosisWord Originlate Middle English (originally denoting a hard external tumour): via medieval Latin from Greek sklērōsis, from sklēroun ‘harden’.
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sclerosis