digit

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A human finger or toe.
2. n. A corresponding part in other vertebrates.
3. n. A unit of length derived from the breadth of a finger and equal to about ³/₄ of an inch (2.0 centimeters).
4. n. One of the ten Arabic number symbols, 0 through 9.
5. n. Such a symbol used in a system of numeration.

Century Dictionary and Cyclopedia

1. n. A finger or toe; in the plural, the third segment of the hand (manus) or foot (pes), consisting of the fingers or toes, each of which has usually three, sometimes two, occasionally one, and rarely more than three, joints or phalanges. In anatomy and zoölogy the term is generic, covering all the modifications of a hand or foot beyond the metacarpus or metatarsus. The digits are specified by qualifying terms: as, the index digit, the forefinger: the middle digit, etc. The inner digits of the hand and foot, respectively, when there are five, as in man, are the thumb and great toe, or the pollex and hallux. See cuts under foot and hand. In common use digit is applied only to a finger.
2. n. A fingerbreadth; a dactyl; one fourth of a palm: a measure of length. The Roman digit was 18.5 millimeters or 0.73 of an English inch. See dactyl and fingerbreadth.
3. n. In astronomy, the twelfth part of the diameter of the sun or moon: used in expressing the quantity of an eclipse: as, an eclipse of six digits (one which hides one half of the diameter).
4. n. One of the first nine numbers, indicated by the fingers in counting on them; also, one of the nine Arabic numerals, 1, 2, 3, 4, 5, 6, 7, 8, 9.
5. To point at or out with the finger.

Wiktionary

1. n. A finger or toe.
2. n. A numeral that can be combined with others to write larger numbers, and that cannot itself be split into other numerals.
3. n. slang, UK, in the plural One's phone number.
4. v. transitive To point at or point out with the finger.

GNU Webster's 1913

1. n. (Zoöl.) One of the terminal divisions of a limb appendage; a finger or toe.
2. n. A finger's breadth, commonly estimated to be three fourths of an inch.
3. n. (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. n. (Anat.) One twelfth part of the diameter of the sun or moon; -- a term used to express the quantity of an eclipse.
5. v. rare To point at or out with the finger.

WordNet 3.0

1. n. one of the elements that collectively form a system of numeration
2. n. a finger or toe in human beings or corresponding body part in other vertebrates
3. n. the length of breadth of a finger used as a linear measure