Webster's English Dictionary

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scientific

sci.en.tif.ic \.si--*n-'tif-ik\ \-i-k(*-)le-\ aj [ML scientificus producing 
   knowledge, fr. L scient-, sciens +] -i- + -ficus -fic : of, relating to, or 
   exhibiting the methods or principles of science  - sci.en.tif.i.cal.ly av