The amount of visible light that passes through the glazing material of a window, expressed as a percentage.
Visible radiation
The visible portion of the electromagnetic spectrum with wavelengths from 0.4 to 0.76 microns.
Visqueen
A particular brand of polyethylene sheet used, in a crawl space, to cover the ground.
Visual right
Occupant's right to see out of a window without being hindered.
Vitreous
Surface material on some plumbing fixtures derived from or consisting of glass, translucent, and low on porosity.
Vitreous china
Ceramic materials fired at high temperature to form a non-porous body, having exposed surfaces coated with ceramic glaze fused to the body. This is used to form bathroom fixtures such as toilets, bidets, and lavs.
Vitreous tile
Tile with water absorption of more than 0.5 percent, but not more than 3.0 percent.
Vitrification
The condition resulting when kiln temperatures are sufficient to fuse grains and close pores of a clay product.
Vitrified
Clay that has been glazed and fired for use as clay pipe.
