Imaginary quantity
Imaginary Im*ag"i*na*ry, a. [L. imaginarius: cf. F. imaginaire.] Existing only in imagination or fancy; not real; fancied; visionary; ideal. [1913 Webster]

Wilt thou add to all the griefs I suffer Imaginary ills and fancied tortures? --Addison. [1913 Webster]

{Imaginary calculus} See under {Calculus}.

{Imaginary expression} or {Imaginary quantity} (Alg.), an algebraic expression which involves the impossible operation of taking the square root of a negative quantity; as, [root]-9, a + b [root]-1.

{Imaginary points}, {lines}, {surfaces}, etc. (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.

Syn: Ideal; fanciful; chimerical; visionary; fancied; unreal; illusive. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • imaginary quantity — menamasis dydis statusas T sritis fizika atitikmenys: angl. imaginary quantity vok. Blindgröße, f; imaginäre Größe, f rus. мнимая величина, f pranc. grandeur imaginaire, f …   Fizikos terminų žodynas

  • imaginary quantity — even root of a negative number (Mathematics) …   English contemporary dictionary

  • Imaginary — Im*ag i*na*ry, a. [L. imaginarius: cf. F. imaginaire.] Existing only in imagination or fancy; not real; fancied; visionary; ideal. [1913 Webster] Wilt thou add to all the griefs I suffer Imaginary ills and fancied tortures? Addison. [1913… …   The Collaborative International Dictionary of English

  • Imaginary calculus — Imaginary Im*ag i*na*ry, a. [L. imaginarius: cf. F. imaginaire.] Existing only in imagination or fancy; not real; fancied; visionary; ideal. [1913 Webster] Wilt thou add to all the griefs I suffer Imaginary ills and fancied tortures? Addison.… …   The Collaborative International Dictionary of English

  • Imaginary expression — Imaginary Im*ag i*na*ry, a. [L. imaginarius: cf. F. imaginaire.] Existing only in imagination or fancy; not real; fancied; visionary; ideal. [1913 Webster] Wilt thou add to all the griefs I suffer Imaginary ills and fancied tortures? Addison.… …   The Collaborative International Dictionary of English

  • Imaginary points — Imaginary Im*ag i*na*ry, a. [L. imaginarius: cf. F. imaginaire.] Existing only in imagination or fancy; not real; fancied; visionary; ideal. [1913 Webster] Wilt thou add to all the griefs I suffer Imaginary ills and fancied tortures? Addison.… …   The Collaborative International Dictionary of English

  • Imaginary — Im*ag i*na*ry, n. (Alg.) An imaginary expression or quantity. [1913 Webster] …   The Collaborative International Dictionary of English

  • imaginary — [i maj′i ner΄ē] adj. [L imaginarius] 1. existing only in the imagination; fanciful; unreal 2. Math. designating or of the square root of a negative quantity, or of a complex number that is not real imaginarily adv. imaginariness n …   English World dictionary

  • 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 unit — i in the complex or cartesian plane; real numbers fall on the horizontal axis, and imaginary numbers fall on the vertical axis In mathematics, the imaginary unit allows the real number system ℝ to be extended to the complex number system ℂ, which …   Wikipedia

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