of, relating to, or characteristic of a eukaryote, an organism whose basic structural unit is a cell containing specialized organelles and a membrane-bound nucleus.
any organism of the domain Eukaryota, having as its fundamental structural unit a cell type that contains specialized organelles in the cytoplasm, a membrane-bound nucleus enclosing genetic material organized into chromosomes, and an elaborate system of division by mitosis or meiosis, characteristic of all life forms except bacteria and other primitive microorganisms.