- An advance; the course of a disease.
- 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]
Search Stedman's Medical Dictionary
Examples: glitazone, GI cocktail, etc.