What do you call an entity composed of more than one cell?

An entity composed of more than one cell is referred to as multicellular. This designation applies to organisms that are made up of numerous cells that work together to perform the functions necessary for life. Examples of multicellular organisms include humans, trees, and animals, where different cells can differentiate to fulfill specialized roles, such as muscle cells for movement or nerve cells for transmitting signals.

In contrast, unicellular refers to organisms that consist of a single cell, like bacteria and some protozoa, which are capable of performing all life processes within that solitary cell. Multinucleated indicates a single cell containing multiple nuclei, often seen in specific muscle types or fungal cells, emphasizing a cellular structure that remains singular despite having multiple genetic control centers. Macromolecular often relates to large complex molecules such as proteins or nucleic acids, rather than describing the organizational structure of living organisms.