Source : Webster's Revised Unabridged Dictionary (1913)

Incrassate \In*cras"sate\, v. t. [imp. & p. p. {Incrassated}; p.
   pr. & vb. n. {Incrassating}.] [L. incrassatus, p. p. of
   incrassare; pref. in- in + crassus thick.]
   To make thick or thicker; to thicken; especially, in
   pharmacy, to thicken (a liquid) by the mixture of another
   substance, or by evaporating the thinner parts.

         Acids dissolve or attenuate; alkalies precipitate or
         incrassate.                              --Sir I.
                                                  Newton.

         Liquors which time hath incrassated into jellies. --Sir
                                                  T. Browne.