binary
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 pl , -ries
7 something composed of two parts or things
8 (Astronomy) See →
binary star
9 short for →
binary weapon (C16: from Late Latin binarius; see bin-)
binary code
n (Computing) the representation of each one of a set of numbers, letters, etc., as a unique sequence of bits, as in ASCII
binary-coded decimal
n a number in binary code written in groups of four bits, each group representing one digit of the corresponding decimal number, (Abbrev)
BCD
binary digit
n either of the two digits 0 or 1, used in binary notation
See also →
bit ^{ 4 }
binary fission
n asexual reproduction in unicellular organisms by division into two similar daughter cells
binary form
n (Music) a structure consisting of two sections, each being played twice
binary notation , system
n a number system having a base of two, numbers being expressed by sequences of the digits 0 and 1: used in computing, as 0 and 1 can be represented electrically as off and on
binary number
n a number expressed in binary notation, as 1101.101 = 1x23 + 1x22 + 0x21 + 1x20 + 1x2--1 + 0x2--2 + 1x2--3 = 13 5/8
binary star
n a double star system containing two associated stars revolving around a common centre of gravity in different orbits. A visual binary can be seen through a telescope. A spectroscopic binary can only be observed by the spectroscopic Doppler shift as each star moves towards or away from the earth, (Sometimes shortened to)
binary See also →
optical double star →
eclipsing binary
binary weapon
n a chemical weapon consisting of a projectile containing two substances separately that mix to produce a lethal agent when the projectile is fired
eclipsing binary , variable
n a binary star whose orbital plane lies in or near the line of sight so that one component is regularly eclipsed by its companion
See also →
variable star
X-ray binary
n a binary star that is an intense source of X-rays and is composed of a normal star in close orbit with a white dwarf, neutron star, or black hole