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Definition of: sclerosis
(sklə·rō′sis) noun
1. Pathol. The morbid thickening and hardening of a tissue; especially, the hardening of the coats of the arteries.
2. Bot. The hardening of a plant cell wall by the formation of lignin in it. [<Med. L sclirosis <Gk. sklērōsis <sklēroein harden <sklēros hard]
—scle·ro′sal adjective
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