NOUN | quantity | significant figure, significant digit | any digit of a number that is known with certainty |
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Meaning | Any digit of a number that is known with certainty; any digit of a number beginning with the leftmost non-zero digit and ending with the rightmost non-zero digit (or a zero considered to be the exact value). | |
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Example | "he calculated the answer to four significant figures" | |

Synonym | significant digit | |

Broader | digit, figure | One of the elements that collectively form a system of numeration |

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