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neutrino definition

neu·trino (no̵̅o̅ trē′nō, nyo̵̅o̅-)

noun pl. neutrinos -·nos

Particle Physics any of three stable leptons having a mass approaching zero and no charge: a neutrino has almost no interaction with matter

Etymology: It, coined by Enrico Fermi < neutrone (< neutron) + dim. suffix -ino

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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