neutrino

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neutrino

 [noo-tre´no]
a subatomic particle with an extremely small mass and no electric charge.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

neutrino

(nū-trē′nō)
In physics, a subatomic particle at rest, with no mass and no electric charge. These particles are constantly flowing through the universe and are not known to affect the matter through which they pass.
Medical Dictionary, © 2009 Farlex and Partners