# binary-number

## binary

[bahy-nuh-ree, -ner-ee]
1.
consisting of, indicating, or involving two.
2.
Mathematics.
a.
of or pertaining to a system of numerical notation to the base 2, in which each place of a number, expressed as 0 or 1, corresponds to a power of 2. The decimal number 58 appears as 111010 in binary notation, since 58 = 1 × 2 5 + 1 × 2 4 + 1 × 2 3 + 0 × 2 2 + 1 × 2 1 + 0 × 2 0 .
b.
of or pertaining to the digits or numbers used in binary notation.
c.
of or pertaining to a binary system.
d.
(of an operation) assigning a third quantity to two given quantities, as in the addition of two numbers.
3.
Chemistry. noting a compound containing only two elements or groups, as sodium chloride, methyl bromide, or methyl hydroxide.
4.
Metallurgy. (of an alloy) having two principal constituents.
noun, plural binaries.
5.
a whole composed of two.
6.
Astronomy, binary star.
7.
Also called binary number. Mathematics. a number expressed in the binary system of notation.

Origin:
1350–1400; Middle English < Late Latin bīnārius, equivalent to bīn(ī) (see bin-) + -ārius -ary

binary, bindery.
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World English Dictionary
 binary (ˈbaɪnərɪ) —adj 1. composed of, relating to, or involving two; dual 2. maths, computing of, relating to, or expressed in binary notation or binary code 3. (of a compound or molecule) containing atoms of two different elements 4. metallurgy (of an alloy) consisting of two components or phases 5. (of an educational system) consisting of two parallel forms of education such as the grammar school and the secondary modern in Britain 6. maths, logic (of a relation, expression, or operation) applying to two elements of its domain; having two argument places; dyadic —n , -ries 7. something composed of two parts or things 8. astronomy See binary star 9. short for binary weapon [C16: from Late Latin bīnārius; see bin-]

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Etymonline
Word Origin & History

binary
mid-15c., from L.L. binarius "consisting of two," from bini "twofold, two apiece, two-by-two," from bis "double" (see bis-). Binary code in computer terminology was in use by 1952, though the idea itself is ancient. Binary star in astronomy is from 1802.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

binary bi·na·ry (bī'nə-rē)

1. Characterized by or consisting of two parts or components; twofold.

2. Consisting of or containing only molecules having two kinds of atoms.

The American Heritage® Stedman's Medical Dictionary
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American Heritage
Science Dictionary
 binary   (bī'nə-rē)  Pronunciation Key  Having two parts. Mathematics Based on the number 2 or the binary number system.
The American Heritage® Science Dictionary
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American Heritage
Cultural Dictionary
binary [(beye-nuh-ree, beye-ner-ee)]

Anything composed of two parts. In modern computers, information is stored in banks of components that act like switches. Since switches can be either on or off, they have a binary character, and we say that the computer uses “binary arithmetic” to do its work.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition