[spaw-ley-shuh n]

Origin of spallation

First recorded in 1945–50; spall + -ation Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for spallation

Historical Examples of spallation

  • Two general types of reactions, known as spallation and fragmentation, are distinguished.

    LRL Accelerators

    Lawrence Radiation Laboratory

British Dictionary definitions for spallation


  1. physics a type of nuclear reaction in which a photon or particle hits a nucleus and causes it to emit many other particles or photons

Word Origin for spallation

C20: from spall + -ation
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

spallation in Medicine


  1. A nuclear reaction in which nuclei are bombarded by high-energy particles, causing the liberation of protons and alpha particles.
  2. Fragmentation.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.