Medical Definition of empirical
1archaic a: following or used in the practice of the empirics—compare rational 2b: being or befitting a quack or charlatan
2: originating in or based on observation or experiment <much medical lore had had an empirical origin…centuries of trial-and-error gropings after remedies—R. H. Shryock>
3: capable of being confirmed, verified, or disproved by observation or experiment <empirical statements or laws>
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