Noun[edit] malapropism â(plural malapropisms) (uncountable) The blundering use of an absurdly inappropriate word or expression in place of a similar-sounding one.
Definition of positron. : a positively charged particle having the same mass and magnitude of charge as the electron and constituting the antiparticle of the electron âcalled also antielectron.
The positron is a type of beta particle (Î² +), the other beta particle being the electron (Î² â) emitted from the Î² â decay of a nucleus. An example of positron emission (Î² + decay) is shown with magnesium-23 decaying into sodium-23: