digit
/ˈdi-jət/
noun
any of the Arabic numerals 1 to 9 and usually the symbol 0
one of the elements that combine to form numbers in a system other than the decimal system
the digits of a telephone number
adjective
greater than or equal to 10 percent and less than 100 percent
double-digit inflation
noun
any of the digits of a number beginning with the digit farthest to the left that is not zero and ending with the last digit farthest to the right that is either not zero or that is a zero but is considered to be exact —called also significant figure