imaginary 
(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 number • 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
not based on fact; unreal (Freq. 7) - "the falsehood about some fanciful secret treaties"- F.D.Roosevelt - a small child's imaginary friends - to create a notional world for oneself • Syn: fanciful, notional • Similar to: unreal
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