Definition of imaginary number Imaginary number
im•ag•i•nar•y num•ber
We found 3 definitions of imaginary number from 3 different sources.
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What does imaginary number mean?
WordNet
Noun |
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| imaginary number - (mathematics) a number of the form a+bi where a and b are real numbers and i is the square root of -1 | ||
| complex number, complex quantity, imaginary | ||
| number an item of merchandise offered for sale; "she preferred the black nylon number"; "this sweater is an all-wool number" | ||
| math, mathematics, maths a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement | ||
| complex conjugate either of two complex numbers whose real parts are identical and whose imaginary parts differ only in sign | ||
| real number, real any rational or irrational number | ||
| pure imaginary number an imaginary number of the form a+bi where a is 0 | ||
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Wiktionary 
- imaginary number (Noun)
A number of the form ai, where a is a real number and i the imaginary unit .
Wikipedia 
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Imaginary numbers, represented by "i", are defined as formula_1. (They are not negative, as a negative number squared is always "positive"; an imaginary number squared is always "negative") Imaginary numbers don't have a "true" meaning, in that you can't have 2"i" apples, but they are just as mathematically correct as any other number we are familiar with.
Imaginary numbers can be 'mixed' with numbers we are more familiar with. For example a whole number such as the number '2' can be added to an imaginary number such as '3i' to create '2+3i'. These kinds of 'mixed' numbers are known as complex numbers.
Imaginary numbers and complex numbers are very useful in higher math, including calculus and circuit analysis, and are used in algebra to find all the possible roots (or solutions) of an equation.
