Zeolite

A material used in water softeners that attracts colloidal particles in water and retains them until the material is subject to water with a high concentration of salt dissolved in it. When in the presence of salt water

Zip cord

A cord built into a package covering that can be used to tear away the covering. The exposed end of the zip cord is pulled on so that it will tear through the package cover and allow it to be pulled away.

Vitreous clay

A clay with a glazed surface that will not absorb water. Vitreous clay tile liners are usually installed in fireplace flues of site fabricated fireplaces.

Vulnerability

A measure of the possibility of something occurring

Wainscot

The wooden paneling of the lower part of an interior wall up to the dado height in a room.