# Square-root definition

3 is the *square root* of 9

Every complex number has two square roots; for example, the square roots of −4 are 2i and −2i.

*square root.*

A divisor of a quantity that when squared gives the quantity. For example, the square roots of 25 are 5 and −5 because 5 × 5 = 25 and (−5) × (−5) = 25.

noun

The number or quantity which when squared will produce a given number or quantity.

3 is the *square root* of 9

noun

A number that, when squared, yields a given number. For example, since 5 × 5 = 25, the square root of 25 (written √25) is 5.

(mathematics) Of a number, another number which, when squared, yields the original number; sometimes constrained to be the positive number when two solutions exist.

Every complex number has two square roots; for example, the square roots of −4 are 2i and −2i.

noun

Attributive form of *square root.*

noun

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Singular:

square-root
Plural:

square-roots