quod erat demonstrandum

Latin phrase
quod erat de·mon·stran·dum | \ˌkwȯd-ˈer-ˌät-ˌde-mən-ˈstran-dəm, -ˌdā-ˌmȯn-ˈsträn-ˌdu̇m\

Definition of quod erat demonstrandum 

: which (is what) was to be shown (originally) abbreviation QED used at the end of a logical or mathematical proof

Learn More about quod erat demonstrandum

Share quod erat demonstrandum

Statistics for quod erat demonstrandum

Look-up Popularity

Comments on quod erat demonstrandum

What made you want to look up quod erat demonstrandum? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to teach someone the beliefs of a group

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Roman Mythology Quiz

  • the-triumph-of-venus-by-alessandro-magnasco
  • Boreal comes from the name of the ancient Greek god of which wind?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!