Answer: neutrino

AnswerCrossword Clue
NEUTRINOParticle name coined by Enrico Fermi
neutrinoany of the massless or nearly massless electrically neutral leptons. There is a distinct kind of neutrino associated with each of the massive leptons
neutrinoa subatomic particle, also NEUTRON
NEUTRINOSubatomic particle with a mass close to zero
NEUTRINONearly massless subatomic particle
NEUTRINOBeta decay byproduct
NEUTRINOMassless elementary particle
NEUTRINOParticle with no electric charge
NEUTRINOSubatomic particle with no electric charge
NEUTRINOSubatomic particle of no charge
NEUTRINOLepton with no charge
NEUTRINOIt's free of charge
NEUTRINOSubatomic particle
NEUTRINOIt's not charged
NEUTRINOElementary particle
NEUTRINOUncharged particle
NEUTRINOMassless particle
NEUTRINOElementary particle with no charge