Webster's Revised Unabridged Dictionary · 1913

digit

digit (dij"it) , noun

[Latin digitus finger; prob. akin to Greek da`ktylos, of uncertain origin; possibly akin to English toe. Compare Dactyl.]

1.
(Zoology) One of the terminal divisions of a limb appendage; a finger or toe.
The ruminants have the “cloven foot,” i. e., two hoofed digits on each foot. — Owen
2.
A finger's breadth, commonly estimated to be three fourths of an inch.
3.
(Mathematics) 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.

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

4.
(Anatomy) 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.

digit , transitive verb

To point at or out with the finger. [Rare]