Source : Webster's Revised Unabridged Dictionary (1913)

Gelatinate \Ge*lat"i*nate\, v. t. [imp. & p. p. {Gelatinated};
   p. pr. & vb. n. {Gelatinating}.]
   To convert into gelatin, or into a substance resembling
   jelly.

Gelatinate \Ge*lat"i*nate\, v. i.
   To be converted into gelatin, or into a substance like jelly.

         Lapis lazuli, if calcined, does not effervesce, but
         gelatinates with the mineral acids.      --Kirwan.