Sclerosis (also sclerosus in the Latin names of a few disorders) is a hardening of tissue and other anatomical features. It may refer to:
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Sclerosis (medicine), a hardening of tissue
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in zoology, a process which forms sclerites, a hardened exoskeleton
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in botany, a process which hardens plant tissue by adding fibers and sclereids, resulting in sclerenchyma
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in economics, eurosclerosis