(Lat. *digitus*, a finger), the measure of a finger's breadth, or three-fourths of an inch.

**Digit**, or **Monade**, in *Arithmetic*, any integer under ten, as, 1, 2, 3, 4, 5, 6, 7, 8, 9, and by means of which all numbers are expressed.

**Digit**, in *Astronomy*, the twelfth part of the diameter of the sun or moon; a term used to express the quantity of an eclipse. Thus an eclipse is said to be of six digits when one-half of the disk is hid.