Definition of Imaginary

Im`ag´i`na`ry
a.1.Existing only in imagination or fancy; not real; fancied; visionary; ideal.
Imaginary calculus
See under Calculus.
Imaginary expression
(Alg.) an algebraic expression which involves the impossible operation of taking the square root of a negative quantity; as, ?-9, a + b ?-1.
Imaginary points
(Geom.) points, lines, surfaces, etc., imagined to exist, although by reason of certain changes of a figure they have in fact ceased to have a real existence.
n.1.(Alg.) An imaginary expression or quantity.


Related Words

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