\Cem`en*ta"tion\, n.
1. The act or process of cementing.
2. (Chem.) A process which consists in surrounding a solid
   body with the powder of other substances, and heating the
   whole to a degree not sufficient to cause fusion, the
   physical properties of the body being changed by chemical
   combination with powder; thus iron becomes steel by
   cementation with charcoal, and green glass becomes
   porcelain by cementation with sand.