| number-cruncher |
(informal) a person, machine, program or the like that performs a great many complicated numerical calculations. |
| octane number |
a number that designates the antiknock properties of a gasoline, based on the percentage of isooctane in it; octane rating. |
| odd number |
a whole number that cannot be divided exactly by 2. |
| one-digit number |
a whole number containing one digit, such as 2. |
| ordinal number |
any number that indicates a position in a numbered order. "First," "third," "fifteenth," and "thousandth" are ordinal numbers. |
| perfect number |
a positive integer that is equal to the sum of its divisors, including one but excluding itself. |
| Personal Identification Number |
an identification number entered on a keypad to gain remote electronic access to one's bank account or other financial accounts. |
| phone number |
a short form of telephone number. |
| prime number |
a number that can be evenly divided only by itself or by one. Two and eleven are prime numbers. |
| registration number |
(chiefly British) the registered set of numbers and letters found on the license plates of a vehicle; license plate number. |
| round number |
a number given in terms of the nearest whole number, or given in the nearest tens, hundreds, or the like. The number 50 is a round number for 47. |
| serial number |
a number that is given to each one of a set of things that are the same. Each number is different. |
| Social Security Number |
a number issued by the U.S. federal government to citizens, permanent residents, and temporary working residents of the United States for the purposes of tracking working individuals. |
| three-digit number |
a whole number containing three digits, such as 365. |
| two-digit number |
a whole number containing two digits, such as 22. |
| whole number |
a counting number or zero. 1, 5, 15, and 258 are examples of whole numbers. |
| without number |
countless. |
| wrong number |
a telephone number incorrectly or mistakenly dialed. [2 definitions] |