[ spaw-ley-shuh n ]
/ spɔˈleɪ ʃən /

noun Physics.

a nuclear reaction in which several nucleons are released from the nucleus of an atom.

Origin of spallation

First recorded in 1945–50; spall + -ation Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for spallation

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

    LRL Accelerators|Lawrence Radiation Laboratory

British Dictionary definitions for spallation

/ (spəˈleɪʃən) /


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

Medicine definitions for spallation

[ spô-lāshən ]


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