Wilt thou add to all the griefs I suffer Imaginary ills
and fancied tortures? --Addison.
{Imaginary calculus} See under {Calculus}.
{Imaginary expression} or {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.