Webster's English Dictionary

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diuretic

di.uret.ic \.di--yu.-'ret-ik\ \-i-k(*-)le-\ aj [ME, fr. MF or LL; MF 
   diuretique, fr. LL diureticus, fr. Gk diou]re-tikos, fr. diourein to 
   urinate, fr. dia- + ourein to urinate - more at URINE : tending to increase 
   the flow of urine  - diuretic n