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null (nŭl) adjective

1. Having no legal force; invalid: render a contract null and void.

2. Of no consequence, effect, or value; insignificant.

3. Amounting to nothing; absent or nonexistent: a null result.

        4. Mathematics. Of or relating to a set having no members or to zero magnitude.

decimal system (dĕsʹə-məl sĭsʹtəm) noun Mathematics.

1. A number system based on units of 10.

2. A system of measurement in which all derived units are multiples of 10 of the fundamental units.

base (bās) noun

1. In mathematics, a number that is raised to the power specified by an exponent. For example, in 23 = 2 × 2 × 2 = 8, the base is 2.

2. In mathematics, the number of digits in a particular numbering system. With microcomputers, four numbering systems are commonly used or referred to—binary, octal, decimal, and hexadecimal—and each is based on a different number of digits. The binary, or base-2, numbering system, which is used to discuss the states of a computer's logic, has two digits, 0 and 1. Octal, or base-8, has eight digits, 0 through 7. The familiar decimal system, or base-10, numbering system, has ten digits, 0 through 9. Hexadecimal, or base-16, has sixteen digits, 0 through 9 and A through F. When numbers are written in a particular base, the base is often subscripted and enclosed in parentheses after the number, as in 24AE(16) = 9390. See also binary, decimal, hexadecimal, octal. Also called radix.

3. One of three terminals (emitter, base, collector) in a bipolar transistor.The current through the base controls the current between the emitter and the collector. See also transistor.

4. The insulating foundation of a printed circuit board. See also circuit board.

positional notation (pə-zish`ə-nəl nō-tā’shən) noun

In mathematics, a form of notation whose meaning relies in part on the relative location of the elements involved. For example, common numeric notation is positional notation. In the decimal number 34, the position of the numeral 3 signifies three 10s and the position of the numeral 4 signifies four 1s.

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Last modified: October 25, 2000