scientific (adj)
Sens 1 : Of, relating to, or used in science
or a branch of science. [source : MWU]
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Sens 2 : Agreeing with or conducted or
prepared strictly according to the principles and practice of or for the
furtherance of exact science. [source : MWU]
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Sens 3 : Conducted or systematized after the
manner of science or according to results of investigation by science:
practicing thoroughness or systematic methods approximating those of
scientists or devised by scientists. [source : MWU]