The term Unicameralism means

Unicameralism refers to a system of government in which the legislature or parliament has only one chamber or house. This means that there is only one group of elected representatives who make and pass laws for the country or region. Unicameralism is in contrast to bicameralism, where the legislative branch is divided into two separate chambers or houses, such as a Senate and a House of Representatives. In a unicameral system, laws can be passed more quickly since there is only one chamber that needs to approve them, but there is also less opportunity for debate and discussion before a law is passed.