A red ocher used to stain mahogany.

A hard substance for removing material by grinding, lapping, honing, and polishing. Common abrasives include silicon carbide, boron carbide, diamond, emery, garnet,

A measure of the abrasion resistance of a vulcanized material or synthetic rubber compound relative to that of a standard rubber compound under

A surface discontinuity caused by roughening or scratching.

To wear away or scrape off a surface, especially by friction.

The volume of a building (in cubic feet or in cubic meters) measured from the average adjoining grade level to the average roof