the deflection of nuclear particles or of radiation in a scattering process through an angle greater than 90°.
The deflection of radiation or particles by electromagnetic or nuclear forces through angles greater than 90° to the initial direction of travel.
The radiation or particles so deflected.
- Back score
a line at each end of the rink parallel to and equidistant from the foot score and the sweeping score.
- Back scratcher
a long-handled device for scratching one’s own back. a person who exchanges favors or services for mutual advantage.
- Back seat
a seat at the rear. take a backseat, to occupy a secondary or inferior position: Her writing has taken a backseat because of other demands on her time. Contemporary Examples Neither candidate has really addressed this issue; it takes a back seat to the economy and the war. Petitions Flood Change.org in Advance of Presidential […]
- Backseat driver
an automobile passenger who offers the driver unsolicited advice, warnings, criticism, etc., especially from the backseat. any person who, by means of criticism, unsolicited advice, or the like, interferes in affairs that are not his or her concern or responsibility. noun phrase A person who gives unwanted and officious advice; kibitzer (1920s+) A passenger who […]