positron

As a noun positron

is .

As an adjective undefined is

lacking a definition or value.

As nouns the difference between axion and positron

is that axion is (physics) a hypothetical subatomic particle postulated to explain some symmetry problems arising in the strong nuclear force while positron is .

As nouns the difference between positron and neutrino

is that positron is the antimatter equivalent of an electron, having the same mass but a positive charge while neutrino is an elementary particle that is classified as a lepton, and has an extremely small but nonzero mass and no electric charge. It interacts with the surroundings only via the weak force or gravitation, making it very difficult to detect.

As a noun positron is

.

As nouns the difference between positron and position

is that positron is the antimatter equivalent of an electron, having the same mass but a positive charge while position is a place or location.

As a verb position is

to put into place.

As nouns the difference between positron and parapositronium

is that positron is while parapositronium is (physics) used attributively to describe the state of a positronium exotic atom in which the positron and electron have antiparallel spins.

As nouns the difference between positron and orthopositronium

is that positron is while orthopositronium is (physics) used attributively to describe the state of a positronium exotic atom in which the positron and electron have parallel spins.

As nouns the difference between positron and negatron

is that positron is while negatron is electron.