Look up click, klik, or klick in Wiktionary, the free dictionary.
Noun. 1. induration-any pathological hardening or thickening of tissue. sclerosis. disseminated multiple sclerosis, disseminated sclerosis, MS, multiple sclerosis-a chronic progressive nervous disorder involving loss of myelin sheath around certain nerve fibers.
Medical Definition of occult. : not manifest or detectable by clinical methods alone occult carcinoma; also : not present in macroscopic amounts occult blood in a stool specimen fecal occult blood testingâcompare gross 1b.