In contrast to unicameralism, multicameralism is the condition in which a legislature is divided into several deliberative assemblies, which are commonly called "chambers" or "houses". This can include bicameralism with two chambers, tricameralism with three, tetracameralism with four branches, or a system with any amount more. The word "multicameral" can also relate in other ways to its literal meaning of "many chambered" with use in science or biology.