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delta ray

noun Physics.

a low-energy electron emitted by a substance after bombardment by higher-energy particles, as alpha particles.

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Nearby words

  1. delta force,
  2. delta function,
  3. delta granule,
  4. delta iron,
  5. delta particle,
  6. delta rhythm,
  7. delta stock,
  8. delta team,
  9. delta virus,
  10. delta wave

Origin of delta ray

First recorded in 1905–10
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for delta ray

delta ray

noun

a particle, esp an electron, ejected from matter by ionizing radiation
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