Sclerosis

Sclerosis or sclerotization is a hardening of tissue and other anatomical features

In medicine

*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 deposit of fat in the arteries which causes hardening
*Hippocampal sclerosis, a brain damage often seen in individuals with temporal lobe epilepsy
*Lichen sclerosus, a disease hardening and connecting flesh of the vagina and the penis of men and women. An autoimmune disorder
*Liver sclerosis, causes the inability of the liver to process and metabolize the female hormone and it causes the imbalance of male and female hormone and impotence
*Multiple sclerosis, a central nervous system disease which affects coordination
*Osteosclerosis, a condition where the bone density is significantly increased
*Otosclerosis, a disease of the ears
*Systemic sclerosis (progressive systemic scleroderma), a rare, chronic disease which affects the skin, and in some cases also blood vessels and internal organs
*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