We're working on a new site. Click here to get a sneak preview.
Medical Dictionary


noun scle·ro·sis \sklə-ˈrō-səs\
plural scle·ro·ses \-ˌsēz\

Medical Definition of SCLEROSIS

:  a pathological condition in which a tissue has become hard and which is produced by overgrowth of fibrous tissue and other changes (as in arteriosclerosis) or by increase in interstitial tissue and other changes (as in multiple sclerosis)—called also hardening
:  any of various diseases characterized by sclerosis—usually used in combination; see arteriosclerosis, multiple sclerosis, myelosclerosis
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears