double prime

noun

Definition of double prime 

: the symbol ″ used to distinguish arbitrary characters (such as a, a′, and a″), to indicate a specific unit (such as inches), or to indicate the second derivative of a function (such as p″ or f″(x)) — compare prime sense 7

First Known Use of double prime

1904, in the meaning defined above

Keep scrolling for more

Learn More about double prime

Share double prime

Statistics for double prime

Look-up Popularity

Time Traveler for double prime

The first known use of double prime was in 1904

See more words from the same year

More from Merriam-Webster on double prime

See words that rhyme with double prime

Comments on double prime

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

WORD OF THE DAY

to express warning or disapproval

Get Word of the Day daily email!

Test Your Vocabulary

Autumn Words of the Day 2018

  • a-top-down-image-of-road-through-an-autumn-forest
  • Which is a synonym of fugacious?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

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!