Lower house

A lower house is one of two chambers of a bicameral legislature, the other chamber being the upper house.

Despite its official position "below" the upper house, in many legislatures worldwide, the lower house has come to wield more power. A legislature composed of only one house is described as unicameral.

In comparison with the upper house, lower houses frequently display certain characteristics:

Many lower houses are named in the following manner: House/Chamber of Representatives/the People/Commons/Deputies.

...
Wikipedia