Definition of square root in US English:
 square root
nounˌskwe(ə)r ˈro͞otˌskwɛ(ə)r ˈrut
A number which produces a specified quantity when multiplied by itself.
 Example sentencesExamples
-  The sum of the square roots of any two sides of an isosceles triangle is equal to the square root of the remaining side.
 -  The eleven chapters of Halifax's text dealt with topics such as addition, subtraction, multiplication, division, square roots and cube roots.
 -  What is the square root of sixteen?
 -  The square root of 2 is an irrational number because it can't be written as a ratio of two integers.
 -  Having taken then the square root of this which is 8, subtract from it half the roots, 5 leaving 3.