Geiger tube definition by American Heritage Dictionary
nounThe American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
A metal or glass tube filled with gas that is ionized by passing charged particles, producing within the tube an electric charge indicative of a particular particle.
Origin: After Hans Wilhelm Geiger (1882-1945), German physicist.
geiger tube - Medical Definition
A metal or glass tube filled with gas and used with a geiger counter.