Definition of neutrino noun from the Oxford Advanced Learner's Dictionary

 

neutrino

 noun
noun
BrE BrE//njuːˈtriːnəʊ//
 
; NAmE NAmE//nuːˈtriːnoʊ//
 
(pl. neutrinos)(physics)
 
jump to other results
an extremely small particle that has no electrical charge, and which rarely reacts with other matter Word Origin 1930s: from Italian, diminutive of neutro ‘neutral’.
See the Oxford Advanced American Dictionary entry: neutrino