*dÃ©cimal,*from Medieval Latin

*decimalis*of a tithe, from Latin

*decima*tithe â€” more at dime

First Known Use: 1608

Dictionary

mathematics : based on the number 10

â€” **dec·i·mal·ly** \-mÉ™-lÄ“\ *adverb*

See decimal defined for English-language learners

See decimal defined for kids

- In the number 8.901, the 9 is in the first
*decimal place*.

French *dÃ©cimal,* from Medieval Latin *decimalis* of a tithe, from Latin *decima* tithe â€” more at dime

First Known Use: 1608

mathematics : a number that is written with a dot between the part of the number that is equal to 1 or more and the part of the number that is less than 1

See decimal defined for English-language learners

- The number 67.398 is a
*decimal*. It is equal to the whole number 67 plus the*decimal*.398. - Seven-tenths written as a
*decimal*is.7. Seven-tenths written as a fraction is {frac7. - The
*decimal*.2 is equal to the fraction {frac2.

1651

Next Word in the Dictionary: decimal arithmeticPrevious Word in the Dictionary: decillionAll Words Near: decimal

Get the Word of the Day direct to your inbox — subscribe today!

Take a 3-minute break and test your skills!

How to use a word that (literally) drives some people nuts.

## Seen & Heard

What made you want to look up

decimal? Please tell us where you read or heard it (including the quote, if possible).