The Collaborative International Dictionary of English v.0.48:

Edulcorate \E*dul"co*rate\, v. t. [imp. & p. p. Edulcorated;
   p. pr. & vb. n. Edulcorating.] [L. e out + dulcoratus, p.
   p. of dulcorare to sweeten, fr. dulcor sweetness, fr. dulcis
   sweet: cf. F. ['e]dulcorer.]
   1. To render sweet; to sweeten; to free from acidity.
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            Succory . . . edulcorated with sugar and vinegar.
                                                  --Evelyn.
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   2. (Chem.) To free from acids, salts, or other soluble
      substances, by washing; to purify. [R.]
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