# imaginary number

__noun__*(mathematics)*a number of the form a+bi where a and b are real numbers and i is the square root of -1•__Syn__: ↑complex number, ↑complex quantity, ↑imaginary•__Topics__: ↑mathematics, ↑math, ↑maths•__Hypernyms__: ↑number•__Hyponyms__: ↑complex conjugate, ↑real number, ↑real, ↑pure imaginary number•__Part Meronyms__: ↑imaginary part, ↑imaginary part of a complex number* * *

*noun***:**imaginary 2* * *

*Math.*Also called**imaginary, pure imaginary number**. a complex number having its real part equal to zero.[1905-10]* * *

a number expressed as the ↑square root of a negative number, especially the square root of -1

*Useful english dictionary.
2012.*

### Look at other dictionaries:

**imaginary number**— n. a complex number in the form a + bi where b is not zero: when a is zero, it is a pure imaginary number … English World dictionary**Imaginary Number**— [dt. »imaginäre Zahl«], komplexe Zahlen … Universal-Lexikon**Imaginary number**— In mathematics, an imaginary number (or purely imaginary number) is a complex number whose squared value is a real number not greater than zero.Ahlfors, Lars V. Complex Analysis. 3rd Ed. New York: McGraw Hill, 1979. Pages 1 4.] The imaginary unit … Wikipedia**imaginary number**— Math. Also called imaginary, pure imaginary number. a complex number having its real part equal to zero. [1905 10] * * * Any number of the form a + bi where a and b are real numbers, i is the square root of 1, and b is not zero. If a is zero, the … Universalium**imaginary number**— noun A number of the form ai, where a is a real number and i = minus;1; a complex number whose real part is zero. Syn: purely imaginary number … Wiktionary**imaginary number**— /ɪˌmædʒənəri ˈnʌmbə/ (say i.majuhnuhree numbuh) noun the square root of a negative number; thus √ ̅1̅ is an imaginary number, denoted by i, and so i2 = 1 … Australian English dictionary**imaginary number**— noun Date: circa 1911 a complex number (as 2 + 3i) in which the coefficient of the imaginary unit is not zero called also imaginary compare pure imaginary … New Collegiate Dictionary**imaginary number**— imag′inary num′ber n. math. a complex number having its real part equal to zero • Etymology: 1905–10 … From formal English to slang**pure imaginary number**— noun an imaginary number of the form a+bi where a is 0 • Hypernyms: ↑complex number, ↑complex quantity, ↑imaginary number, ↑imaginary • Hyponyms: ↑imaginary part, ↑imaginary part of a complex number * * * Math … Useful english dictionary**purely imaginary number**— noun An imaginary number … Wiktionary