back scatter

back·scat·ter

[bak-skat-er]
noun Physics.
the deflection of nuclear particles or of radiation in a scattering process through an angle greater than 90°.
Also, back·scat·ter·ing.


Origin:
1955–60; back2 + scatter

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Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
back scatter
 
n
1.  the scattering of particles or radiation, such as sound waves, X-rays, or alpha-particles, by the atoms of the medium through which they pass, in the backward direction
2.  the radiation or particles so scattered
3.  a technique whereby very long-range radars locate targets hidden by the curvature of the earth. Radar beams are reflected off the underside of the troposphere onto the target and the return beams, similarly reflected, are measured

Collins English Dictionary - Complete & Unabridged 10th Edition
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00:10
Back scatter is always a great word to know.
So is quincunx. Does it mean:
a gadget; dingus; thingumbob.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
American Heritage
Science Dictionary
backscatter   (bāk'skāt'ər)  Pronunciation Key 
  1. The deflection of radiation or particles by electromagnetic or nuclear forces through angles greater than 90° to the initial direction of travel.

  2. The radiation or particles so deflected.


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