prokaryocyte /prōker″ē·əsīt′/ [Gk, protos, first, karyon, nut, kytos, cell] , a cell without a true nucleus and with nuclear material scattered throughout the cytoplasm. Prokaryocytic organisms (Procaryotae) include bacteria, viruses, mycoplasmas, actinomycetes, and blue-green algae. Also spelled procaryocyte. Compare eukaryocyte.