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.
caustic. adj. 1. (Chemistry) capable of burning or corroding by chemical action: caustic soda. 2. sarcastic; cutting: a caustic reply. 3. (General Physics) of, relating to, or denoting light that is reflected or refracted by a curved surface. n. 4. (General Physics) Also called: caustic surface a surface that envelops the light rays reflected or refracted by a curved surface. 5.