composed of many distinct individuals united to form a whole or colony; "coral is a colonial organism"
1. Level of organization intermediate between unicellular and multicellular - organisms are composed of multiple cells but fail to exhibit specialization of those cells. Examples: Volvox, a colonial alga. Click HERE to view a series of images of Volvox. 2. Term applied to organisms that occur in a fixed location, with one generation growing atop previous generations, as in coral reefs.
Condition in which many unicellular organisms live together in a somewhat coordinated group. Unlike true multicellular organisms, the individual cells retain their separate identities, and usually, their own membranes and cell walls.