BEING IN AND OF ITSELF, LATIN. BEHOLD, WORD THAT IS ITS OWN ORIGIN!
int. — in mathematics: “which was to be demonstrated.” Placed at the end of a proof to indicate that a stated theorem has just been proved
n. — in normal, everyday speak: a conclusive demonstration; a justification; a mic-drop; “boom goes the dynamite”
fm. Latin: quod erat demonstrandum
first published. 1614
inspiration. the good people at the NPR Politics Podcast, who in their 5 February Listener Mail episode correctly used and then questioned the word