square root

noun

Definition of square root

:a factor of a number that when squared gives the number
  • the square root of 9 is ±3

Examples of square root in a Sentence

  1. The square root of 9 is 3.

First Known Use of square root

1557


SQUARE ROOT Defined for English Language Learners

square root

noun

Definition of square root for English Language Learners

  • mathematics : a number that produces a specified number when it is multiplied by itself


SQUARE ROOT Defined for Kids

square root

noun

Definition of square root for Students

:a number that when multiplied by itself equals a specified number
  • The square root of 9 is 3.


Seen and Heard

What made you want to look up square root? 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

marked by intense feeling

Get Word of the Day daily email!

Test Your Vocabulary

Find the Cousins

  • a-large-tree-with-many-branches
  • Which pair shares a common word ancestor?
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!