- incrustation, encrustation - the formation of a crust
 --1 is a kind of formation
 Derived form: verb encrust3 
- crust, incrustation, encrustation - a hard outer layer that covers something
 --2 is a kind of covering, natural covering, cover
 --2 has particulars: tartar, calculus, tophusDerived forms: verb encrust1, verb encrust3 
- incrustation, encrustation - a decorative coating of contrasting material that is applied to a surface as an inlay or overlay
 --3 is a kind of decoration, ornament, ornamentation
 Derived form: verb encrust2