Definition of: scientific

(sī′ən·tif′ik) adjective
1. Of, pertaining to, discovered by, derived from, or used in science; of the nature of science.
2. Agreeing with the rules, principles, or methods of science; accurate; systematic; exact.
3. Versed in science or a science; eminently learned or skilful. Also sci′en·tif′i·cal. [<F scientifique <LL scientificus <scientia knowledge + facere make; orig. trans. of Gk. epistēmonikos pertaining to knowledge, science]
—sci′en·tif′i·cal·ly adverb