Langmuir diffusion pump

Langmuir diffusion pump

[¦laŋ·myu̇r di′fyü·zhən ‚pəmp]
(engineering)
A type of diffusion pump in which the mercury vapor emerges from a nozzle, giving it motion in a direction away from the high-vacuum side of the pump.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.