# An Etymological Dictionary of Astronomy and AstrophysicsEnglish-French-Persian

## فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

### M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 2 Search : significant digit
 accurate to n significant digits   رشمند با n رقم ِ نشانار   rašmand bâ n raqam-e nešânârFr.: écrit avec n chiffres significatifs   An expression specifying the number of meaningful digits used to express the value of a measured quantity. Same as accurate to n significant figures. For example, e = 2.71828 ... = 2.718 is rounded to four significant digits, and 2.72 to three significant digits. → accurate to n decimal places.→ accurate; → significant; → digit. significant digit   رقم ِ نشانار   raqam-e nešânârFr.: chiffre significatif   The number of digits used to express a measured or calculated quantity. Rules for deciding the number of significant digits: The leftmost digit which is not a zero is the most significant digit. If the number does not have a decimal point, the rightmost digit which is not a zero is the least significant digit. If the number does have a decimal point, the rightmost significant digit is the least significant digit, even if it's a zero. Every digit between the least and most significant digits should be counted as a significant digit.→ significant; → digit.