» Z-brace door A door made of vertical planks held together and braced on the back by three pieces of wood whose configuration resembles the letter Z.
» Zero-slump concrete A concrete mixed with so little water that it does not sag when piled vertically.
» Zinc A relatively weak and brittle nonferrous metal used, most notably, as a protective galvanic coating for steel.
» Zoning ordinance A law that specifi es in detail how land within a municipality may be used.
