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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.
Also called molecular ray. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for molecular beam
Historical Examples
  • In trying to crash into the ship, they were simply caught by Morey's or Wade's molecular beam and thrown away.

    Islands of Space John W Campbell
  • Arcot accelerated away from it as Fuller hit it with a molecular beam.

    Islands of Space John W Campbell
  • Wade triggered the molecular beam, and the missile was suddenly dashing toward the ground with terrific speed.

    Islands of Space John W Campbell
  • Then Morey held it with a molecular beam, and I tried twisting it.

    The Black Star Passes John W Campbell
  • When the molecular beam hit it, every one of those fast moving molecules shot upward together!

    Islands of Space John W Campbell
  • The molecular beam projector simply projected the field that caused molecular motion to take place as wanted.

    Islands of Space John W Campbell
  • By careful use of the heat beam and the molecular beam, the Earthmen had managed to jockey the two battle cruisers back to Nansal.

    Islands of Space John W Campbell
  • The pale glow of the molecular beam reached out its ghostly finger and touched the heavy-walled ray projector building.

    Islands of Space John W Campbell
  • Waiting no longer to determine that it was not a ship of this world, he shot a molecular beam at it.

    Invaders from the Infinite John Wood Campbell
  • A molecular beam reached down, and the black metal dome sailed high into the sky, breaking the solidity of the magnetic wall.

    Islands of Space John W Campbell
British Dictionary definitions for molecular beam

molecular beam

(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
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