backscatter

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back·scat·ter / ˈbakˌskatər/ • n. Physics deflection of radiation or particles through an angle of 180°. ∎  radiation or particles that have been deflected in this way. ∎ Photog. light from a flashgun or other light source that is deflected directly into a lens: backscatter causes an underexposed picture with a blizzard effect.• v. [tr.] Physics deflect (radiation or particles) through an angle of 180°: [as adj.] (backscattered) backscattered sound reaches the sonar receiver.

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