molecular beam

noun Physics.

a stream of molecules freed from a substance, usually a salt, by evaporation and then passed through a narrow slit for focusing, for investigating the properties of nuclei, atoms, and molecules.

Nearby words

  1. mole run,
  2. mole salamander,
  3. molech,
  4. molecular,
  5. molecular astronomy,
  6. molecular biology,
  7. molecular clock,
  8. molecular cloud,
  9. molecular disease,
  10. molecular distillation

Also called molecular ray. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for molecular beam

molecular beam

molecular ray


physics a parallel beam of molecules that are at low pressure and suffer no interatomic or intermolecular collisions
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012