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[an-tee-noo-tree-noh, -nyoo-, an-tahy-] /ˌæn ti nuˈtri noʊ, -nyu-, ˌæn taɪ-/
noun, plural antineutrinos. Physics.
the antiparticle of a neutrino, distinguished from the neutrino by having clockwise rather than counterclockwise spin when observing in the direction of motion.
Origin of antineutrino
First recorded in 1930-35; anti- + neutrino Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for antineutrino


noun (pl) -nos
the antiparticle of a neutrino; a particle having oppositely directed spin to a neutrino, that is, spin in the direction of its momentum
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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antineutrino in Science
  (ān'tē-n-trē'nō, ān'tī-)   
The antiparticle that corresponds to the neutrino.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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