English Lexicon

Root Number

/ruːt ˈnʌm.bər/
nounCEFR B2 (Upper)Top #1500 frequency
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Comprehensive Definitions & Senses

2 senses
As noun
  1. 1

    A number that, when multiplied by itself a certain number of times, produces a given number.

    "The square root of 16 is 4, since 4 multiplied by itself equals 16."
  2. 2

    In mathematics, a root number can refer to any number that satisfies the equation x^n = a, where n is a positive integer.

    "The cube root of 27 is 3, because 3 raised to the power of 3 equals 27."

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Antonyms & Contrasting Words (1)

Linguistic Origin & Historical Etymology

The term 'root' originates from the Old English 'rōt', which means the part of a plant that attaches it to the ground. 'Number' comes from the Latin 'numerus', meaning a count or quantity. The combination reflects a mathematical concept where a root number refers to a value that, when raised to a certain power, yields another number.

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