plus/minus sign

noun

Definition of plus/minus sign

: the sign ± used to indicate a quantity (such as 2 in "the square root of 4 is ±2") taking on both an algebraically positive value and its negative and to indicate a plus or minus quantity (such as 4 in "the population age was 30 ± 4 years") called also plus/minus symbol

First Known Use of plus/minus sign

1971

in the meaning defined above

See Words from the same year
NEW! Time Traveler

Seen and Heard

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

Love words? Need even more definitions?

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

WORD OF THE DAY

deserving of honor or esteem

Get Word of the Day daily email!

Test Your Vocabulary

Name More Food!

True or False

Test your knowledge - and maybe learn something along the way.

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!