(1) Scattering of light rays as by reflection; the softening of light as by use of frosted glass. (2) Intermingling of the molecules of liquids or gases. (3) Dispersing or spreading out.
Diffusion length
The mean distance a free electron or hole moves before recombining with another hole or electron.
Diffusion welding
Welding process joining parts, without deforming them, by use of heat and pressure because they are not melted or moved.
Dig and set
Also called cut and cover, this method of laying pipe and trenching eliminates the need to remove a large amount of dirt by using the soil from one section to cover the pipe in an adjoining section. Therefore, only the original soil must be removed, since the rest is buried as the work progresses down the line.
Digester (anaerobic)
A device in which organic material is biochemically decomposed (digested) by anaerobic bacteria to treat the material and/or to produce biogas.
Digital images
Pictures incorporated into home listings to give a view of the property.
Digital multitester
A multitester is a device for measuring the electrical values of components, equipment or devices that require ac or dc power. Digital multitesters indicate electrical values by means of a numeric lcd readout.
Dike
(1) An embankment or dam made to prevent flooding by a body of water. (2) A protective barrier.
Dilapidate
To cause to become partially ruined and in need of repairs.
Dilate
(1) To make wider or larger. (2) To cause to expand or swell. Dilute To thin down or weaken by mixing with other liquid.
