v. t. [ imp. & p. p. Gelatinated p. pr. & vb. n. Gelatinating. ] To convert into gelatin, or into a substance resembling jelly. [ 1913 Webster ]

v. i. To be converted into gelatin, or into a substance like jelly. [ 1913 Webster ]

Lapis lazuli, if calcined, does not effervesce, but gelatinates with the mineral acids. Kirwan. [ 1913 Webster ]