Background radiation
noun
see cosmic background radiation
background radiation back·ground radiation (bāk’ground’)
n.
relatively constant low-level radiation from environmental sources such as building materials, cosmic rays, and ingested radionucleides in the body.
low-level radiation at the surface of the earth that comes from cosmic rays and from small amounts of radioactive materials in rocks and the atmosphere.
Read Also:
- Backing dog
noun (nz & austral) a dog that moves a flock of sheep by jumping on their backs
- Backing light
also called backing striplight, backing strip. theater. a striplight providing diffused illumination for the background of a stage set. backup light.
- Backing store
noun a computer storage device, usually a disk, that provides additional storage sp-ce for information so that it can be accessed and referred to when required and may be copied into the processor if needed 1. computer memory, usually magnetic disks, storing data and programs. sections of this information can then be copied into the […]
- Backlashed
a sudden, forceful backward movement; recoil. a strong or violent reaction, as to some social or political change: a backlash of angry feeling among southern conservatives within the party. machinery. the sp-ce between the thickness of a gear tooth and the width of the sp-ce between teeth in the mating gear, designed to allow for […]
- Backlashing
a sudden, forceful backward movement; recoil. a strong or violent reaction, as to some social or political change: a backlash of angry feeling among southern conservatives within the party. machinery. the sp-ce between the thickness of a gear tooth and the width of the sp-ce between teeth in the mating gear, designed to allow for […]