positrino

noun
pos·i·tri·no | \ ˌpäzə‧ˈtrē(ˌ)nō \
plural -s

Definition of positrino 

: a hypothetical atomic particle similar to the neutrino and having an immeasurably small mass and a positive charge

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History and Etymology for positrino

positron + -ino (as in neutrino)

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