1. A more or less central body in the vesicular nucleus of certain Feulgen-negative (DNA−) protozoa (trypanosomes, parasitic amebae, and phytoflagellates), with the chromatin (DNA+) lying between the nuclear membrane and the endosome.
The definition information for endosome is provided by Stedman's. You can search our medical dictionary here.
Stedman's, part of Lippincott Williams & Wilkins, provides a comprehensive line of health-science publications for healthcare professionals and medical students.