What is the name of a three part government?

There is not a specific name or title for the three branches of government, which consist of the Legislative, Judicial and Executive Branches.

Often governments like the US government, which consist consist of the Legislative, Judicial and Executive Branches, are bicameral parliament or bicameral legislature

governments. A Bicameral legislature is made up of 2 chambers of representatives, and upper and a lower house.

In the US, the Senate is the upper house and the Congress is the lower house. In the United Kingdom the House of Lords are the upper house and Parliament is the lower house.