Hardness - ability of wood to resist to penetration of firmer bodies. The Structure (English - texture) - natural drawing, visible at a trunk cut, the visual characteristic of wood defined by its anatomic structure, width and the form of year rings.
The invoice - a visible structure of a surface of a material. There are invoices relief and smooth. In turn relief invoices share on corrugated and imprinted, at carpet products - nap.
Fold - rectangular sample on a board or board edge. The square fold with the party equal to half of a thickness of a board, is called as a quarter.
Frieze - a decorative figured border (the image or an ornament) in the form of a horizontal strip.
Thorn - a ledge on a wooden detail which enters into a groove of other preparation at connection among themselves.