Definition of "digit" []

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

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The remaining digit is known as the “check digit,” which is used to help determine whether or not the overall number is legitimate."
• "Now we have to go up considerably in scale, and there aren't any squares ending in more than five repeated 4's, as the sixth last digit is always odd (1's and 9's, however, continue) 2088941230489 (1445317 squared) in base 10 is 1E65E999999 in hex"
• "ID guy insists that Shannon Information doesn't deal in fractional bits, even when it was pointed out that Shannon said "a decimal digit is about 3 1/3 bits.""