Mich. Comp. Laws § 213.301

Sec. 1. As used in this act (a) "Public hospital" means a hospital whose property, or any portion of whose property, is exempt from taxation under the provisions of Act No. 206 of the Public Acts of 1893, as amended, being sections 211.1 to 211.157 of the Compiled Laws of 1948. (b) "Public college" and "public university" mean any such institution which has been established for at least the 10 years immediately preceding any proposed taking of any of its property and which is empowered by the state to grant degrees.