Incrustation

Webster's Dictionary of the English Language

·noun Anything inlaid or imbedded.

II. Incrustation ·noun The act of incrusting, or the state of being incrusted.

III. Incrustation ·noun A covering or inlaying of marble, mosaic, ·etc., attached to the masonry by cramp irons or cement.

IV. Incrustation ·noun A crust or hard coating of anything upon or within a body, as a deposit of lime, sediment, ·etc., from water on the inner surface of a steam boiler.