derived from or guided by experience or experiment.

depending upon experience or observation alone, without using scientific method or theory, esp. as in medicine.

provable or verifiable by experience or experiment.

adjective

conjectural , hypothetical , impractical , theoretic , theoretical , unobserved , unproved

adjective

empiric , experient , experiential , experimental , factual , observational , observed , pragmatic , provisional , [[speculativenotes:empirical describes results determined by experiment and observed behavior or facts; theoretical describes results that are based on guesswork or hypothesis - and pragmatic is contrasted with theoretical on the grounds that the former proceeds from what is demonstrably practical]] , the latter from conjecture , hypothetical , practical , provable , verifiable