Also spelled eukaryote. A cell characterized by compartmentalization (by membranes) of its extensive internal structures; or an organism made up of such cells. For example, eucaryotes possess a distinct membrane-surrounded nucleus containing the DNA. Eucaryotic cells (e.g., human cells) are much larger and more complex than procaryotic cells (e.g., bacteria). The cells of all higher organisms, both plant and animal, are eucaryotic.
Multicelled living beings. Cells are characterized by the presence of a membrane surrounding the nucleus.