A type of colony with a genetically-predetermined morphology and number of cells; each cell of the parent colony can produce an autocolony that is an exact replica of the parent colony

a colony with a set number of cells, typically some power of 2.

A coenobium (plural coenobia) is a colony containing a fixed number of cells, with little or no specialization. They occur in several groups of algae. The cells are often embedded in a mucilaginous matrix and may be motile or non-motile.