a finger or toe.

the breadth of a finger used as a unit of linear measure, usually equal to 3 / 4 in. (2 cm).

any of the Arabic figures of 1 through 9 and 0.

any of the symbols of other number systems, as 0 or 1 in the binary.

index ( def. 6 ) .

Astronomy . the twelfth part of the sun's or moon's diameter

used to express the magnitude of an eclipse.

noun

arabic , chiffer , cipher , figure , integer , notation , numeral , symbol , whole number , claw , extremity , fang , feeler , finger , fork , hook , index finger , phalange , pinkie , pointer , ring finger , thumb , toe , number , one , unit