The Collaborative International Dictionary of English v.0.48:
medicaid \medicaid\ n. A program controlled by the United States government to provide health care for the needy. It is funded by contributions from the salaries of workers, and is therefore a form of health insurance. [WordNet 1.5 +PJC]WordNet (r) 3.0 (2006):
Medicaid n 1: health care for the needy; a federally and state-funded program