backscatter

v. scatter radiation by atoms of the medium through which it passes

n. deflection of nuclear particles or deviation of radiation in a scattering procedure through angles greater than ninety degrees; radiation or particles deflected in this manner

For information on Backscatter technologies to search people, vehicles and buildings, see Backscatter X-ray Backscatter is the reflection of waves, particles, or signals back to the direction they came from. The term is used in several fields of physics, as well as in photography, telecommunication, and e-mail.
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Verb
1. scatter (radiation) by the atoms of the medium through which it passes
(hypernym) break up, disperse, scatter
(classification) physics, physical science, natural philosophy

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