<p><strong>noun</strong></p><ul><li>Pathology: A chronic infectious disease, caused by a spirochete, <em>Treponema pallidum</em>, usually venereal in origin but often congenital, and affecting almost any organ or tissue in the body, especially the genitals, skin, mucous membranes, aorta, brain, liver, bones, and nerves.</li></ul><p><strong>End of Response</strong></p>