1. (prog′res)An advance; the course of a disease. 2. (pro-gres′)To advance; to go forward; said of a disease, especially, when unqualified, of one taking an unfavorable course. [L. pro-gredior, pp. -gressus, to go forth, fr. gradior, to step, go, fr. gradus, a step]
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Perindopril Protection Against Recurrent Stroke StudyMedical dictionary. 2011.