Sclerosis

Sclerosis or sclerotization is a hardening of tissue

In medicine

 * multiple sclerosis, a central nervous system disease which affects coordination
 * hippocampal sclerosis, a brain damage often seen in individuals with temporal lobe epilepsy
 * systemic sclerosis (progressive systemic scleroderma), a rare, chronic disease which affects the skin, and in some cases also blood vessels and internal organs
 * amyotrophic lateral sclerosis sometimes known as Lou Gehrig's disease, a progressive, incurable, usually fatal disease of motor neurons. Scientist Stephen Hawking suffers from this disease.
 * atherosclerosis, a disease of arteries
 * otosclerosis, a disease of the ears
 * osteosclerosis, a condition where the bone density is significantly increased
 * tuberous sclerosis, a rare genetic disease which affects multiple systems

In botany

 * a process which hardens plant tissue by adding fibers and sclereids, resulting in sclerenchyma.

Sclérose Склероз Skleros