n. an organism with "good" or membrane-bound nuclei having multiple chromosomes; eucaryotes also have other membrane-bound organelles such as mitochondria or chloroplasts, within the cytoplasm enclosed by the outer membrane. Such cells are characteristic of all life forms except primitive microorganisms such as bacteria and blue-green algae. Contrasted with
adj. having cells with visible nuclei surrounded by a nuclear membrane; pertaining to eukaryotes. Contrasted with
‖n. [ NL., fr. Gr.
a. (Biol.) Of or pertaining to karyokinesis;
‖n. [ NL., Gr.
‖n. [ NL., fr. Gr.
a. (Biol.) Pertaining to, or connected with, karyostenosis;
pos>n. (Anat.) A large bone marrow cell not usually found in the circulating blood; it is regarded as the precursors of blood platelets; it is up to 100 μm in diameter, with a polyploid nucleus. Also referred to as
adj. Of or pertaining to a megakaryocyte. [ WordNet 1.5 ]