kappa particle

kappa particle

[′kap·ə ‚pard·ə·kəl]
(cell and molecular biology)
A self-duplicating nucleoprotein particle found in various strains of Paramecium and thought to function as an infectious agent; classed as an intracellular symbiont, occupying a position between the viruses and the bacteria and organelles.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.