| Noun | 1. | induration - any pathological hardening or thickening of tissue disseminated multiple sclerosis, disseminated sclerosis, MS, multiple sclerosis - a chronic progressive nervous disorder involving loss of myelin sheath around certain nerve fibers ALS, amyotrophic lateral sclerosis, Lou Gehrig's disease - thickening of tissue in the motor tracts of the lateral columns and anterior horns of the spinal cord; results in progressive muscle atrophy that starts in the limbs arteriolosclerosis - sclerosis of the arterioles arterial sclerosis, arteriosclerosis, coronary-artery disease, hardening of the arteries, induration of the arteries - sclerosis of the arterial walls osteosclerosis - abnormal hardening or eburnation of bone pathology - any deviation from a healthy or normal condition |