Definition of "electron multiplier" [electron multiplier]

• A vacuum tube in which a single electron produces a large number of secondary electrons by collision with an anode, the process generally being repeated through a number of stages to achieve great amplification of current. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.