source: Decimals

relating to or denoting a system of numbers and arithmetic based on the number ten, tenth parts, and powers of ten:

10進法の

e.g. decimal arithmetic.

relating to or denoting a system of currency, weights and measures, or other units in which the smaller units are related to the principal units as powers of ten:

e.g. decimal coinage.

a fraction whose denominator is a power of ten and whose numerator is expressed by figures placed to the right of a decimal point.

小数(decimal fraction)

the system of decimal numerical notation.

decimally adverb

early 17th century: from modern Latin decimalis (adjective), from Latin decimus ‘tenth’.