digit

1. (Zoöl.) One of the terminal divisions of a limb appendage; a finger or toe.
2. A finger's breadth, commonly estimated to be three fourths of an inch.
3. (Math.) One of the ten figures or symbols, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, by which all numbers are expressed; -- so called because of the use of the fingers in counting and computing.
4. (Anat.) One twelfth part of the diameter of the sun or moon; -- a term used to express the quantity of an eclipse; as, an eclipse of eight digits is one which hides two thirds of the diameter of the disk.

By some authorities the symbol 0 is not included with the digits.
v. t.

1. To point at or out with the finger.