from
The Collaborative International Dictionary of English v.0.48
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.
[1913 Webster]
Acids dissolve or attenuate; alkalies precipitate or
incrassate. --Sir I.
Newton.
[1913 Webster]
Liquors which time hath incrassated into jellies. --Sir
T. Browne.
[1913 Webster]