Definition of backscattered:
(n) :
(physics) The deflection of particles or radiation through angles greater than 90 degrees to the original direction of travel.
(n) :
The particles or radiation deflected in this manner.
(n) :
(military) A portion of the energy of electromagnetic radiation such as a laser or radio waves that is scattered back in the direction of the source of radiation by an obscurant.
(n) :
(computing) The sending of IP packets to essentially random addresses in response to incoming packets that have a spoofed origin.
(v) :
(ambitransitive) To scatter particles or radiation back to the direction from which they originate.