Merriam-Webster Collegiate Dictionary - digit

 noun  Etymology: Middle English, from Latin ~us finger, toe; perhaps akin to Greek deiknynai to show — more at diction  Date: 14th century  1.  a. any of the Arabic numerals 1 to 9 and usually the symbol 0  b. one of the elements that combine to form numbers in a system other than the decimal system  2. a unit of length based on the breadth of a finger and equal in English measure to 3/4 inch  3. any of the divisions in which the limbs of most vertebrates terminate, which are typically five in number but may be reduced (as in the horse), and which typically have a series of phalanges bearing a nail, claw, or hoof at the tip — compare finger 1, toe 1a