A quasi corporation generally refers to an entity that exercises some of the functions of a corporation, but has not been granted separate legal personality by statute

Statute

A statute is a formal written enactment of a legislative authority that governs a state, city, or county. Typically, statutes command or prohibit something, or declare policy. The word is often used to distinguish law made by legislative bodies from case law, decided by courts, and regulations...

, particularly a public corporation with limited authority and powers such as a county or school district. In the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

such entities are often referred to as quasi-municipal corporations.