Also found in: Thesaurus, Medical, Legal, Encyclopedia, Wikipedia.
Related to backscatter: backscatter spam, backscatter radiation


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.

back′scat′ter v.


1. (General Physics) 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. (General Physics) the radiation or particles so scattered
3. (Military) 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
to scatter in this way


(ˈbækˌskæt ər)

1. the deflection of radiation by scattering in a direction opposite to the direction of incidence.
2. radiation scattered in this manner.


Refers to a portion of the laser energy that is scattered back in the direction of the seeker by an obscurant. See also laser.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Verb1.backscatter - scatter (radiation) by the atoms of the medium through which it passesbackscatter - scatter (radiation) by the atoms of the medium through which it passes
natural philosophy, physics - the science of matter and energy and their interactions; "his favorite subject was physics"
disperse, scatter, break up - cause to separate; "break up kidney stones"; "disperse particles"
References in periodicals archive ?
In an effort to ensure the most efficient and effective use of security technology, TSA is strategically reallocating backscatter advance imaging technology units in order to allow for expanded use of advance imaging technology units at other airports," Castelveter said.
There are two systems in use: backscatter and millimeter wave.
Backscatter attributed to rockfish were collected primarily near the seafloor at a mean height off the bottom of 1.
Therefore the aim of this study is to examine the relationship between the ALOS PALSAR backscatter and the woody AGB of secondary forests in East Kalimantan, calculated using trees with a DBH >10 cm and >1 cm.
However, the second type of scanner currently deployed at airports uses backscatter X-rays that expose the individual being screened to very low levels of ionizing radiation.
Topics include the small perturbation surface backscattering model, the simplified integral equation surface backscattering model, the IEM-B surface backscattering model and its bistatic properties, backscatter from multiscale surfaces, the standard moment method, a model for scattering from a low-dielectric layer of Rayleigh scatterers with irregular layer boundaries, and emission models for rough surfaces and a Rayleigh layer with irregular layer boundaries.
Millimetre wave and backscatter imaging technologies will both be tested at the airport.
SECNAP Beats Backscatter Spam Using Innovative SpammerTrap
The Gemini Parcel X-ray Inspection System from American Science & Engineering of Billerice, Massachusetts, combines dual-energy transmission with patented Z Backscatter technology for the most comprehensive threat detection available for parcel, baggage, and mail screening.
The x-ray backscatter sensor, which will be shown for the first time at NPE in Chicago next month, uses an ionization chamber to detect reflected x-rays.
In a continuing effort to offer the best range of thickness measurement gauges, NDC Infrared Engineering is introducing the Model 318 X-Ray Backscatter (XRB) Sensor.
Backscatter is caused when x-ray radiation passes through the cassette, bounces and reenters the cassette.