aukastafur

From auka- (“extra, additional”) +‎ stafur (“character, letter”).

• IPA^(key): /ˈøyːkaˌstaːvʏr/

  Rhymes: -aːvʏr

aukastafur m (genitive singular aukastafs, nominative plural aukastafir)

1. (mathematics) a numeral appearing in the fractional part of a number written in positional notation (i.e. after the radix point), e.g. a numeral in some decimal place in a decimal number

This word refers to the numerals themselves rather than their positions, so its meaning is not quite the same as that of English decimal place or place; however, it is often used in similar contexts, such as when counting decimal places, e.g. námunda að þremur aukastöfum (“to round to three decimal places”).

• hækka upp (“to round up, to change a number by removing decimals and incrementing the last decimal: 16.666 → 16.7”)
• jafna út (“to raise or lower the value of a number by removing decimals”)