Webster's English Dictionary

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digit

dig.it \'dij-*t\ n [ME, fr. L digitus finger, toe] 1a: any of the arabic 
   numerals 1 to 9 and usu. the symbol 0  1b: 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 m easure to 
   3/4 inch 3: FINGER, TOE