rare. [ad. med.L. excrustātiōn-em f. excrustāre, f. ex- (see EX- pref.1) + crusta CRUST, covering.] The stripping a book of its covering of precious metal.
1844. Maitland, Dark Ages, Ess. xiii. 218. Charity and need, as well as cupidity were likely to produce what was then termed excrustation, and to risk … the destruction of the manuscript. [Maitland refers in footnote to Vit. Aldhelmi, Die uno xii textus Evangeliorum … et auro nudata et excrustata sunt.]
