Is it ensure, insure, or assure?
Medicare Med·i·care or med·i·care (měd'ĭ-kâr')
A program under the U.S. Social Security Administration that reimburses hospitals and physicians for medical care provided to qualifying people over 65 years old.
A federal program providing medical care for the elderly. Established by a health insurance bill in 1965, as part of President Lyndon Johnson's Great Society, the Medicare program made a significant step for social welfare legislation and helped establish the growing population of the elderly as a pressure group. (See entitlements.)
A federal health insurance program, administered by the Social Security Administration, that provides health care for the aged.