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imaginary axis

American  
[ih-maj-uh-ner-ee ak-sis] / ɪˈmædʒ əˌnɛr i ˈæk sɪs /

noun

Mathematics.
  1. the vertical axis in an Argand diagram.


Etymology

Origin of imaginary axis

First recorded in 1700–05

Example Sentences

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Label the x-axis as the real axis and the y-axis as the imaginary axis.

From Textbooks Feb. 13, 2015

The horizontal axis is the real axis, and the vertical axis is the imaginary axis.

From Textbooks Feb. 13, 2015

The line for which λ is real, positive and less than unity corresponds to the imaginary axis of the τ-plane, lying in the interior of the fundamental region.

From Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" by Various

Pole, the name given to the extremities of the imaginary axis of the earth, round which it is conceived to revolve.

From The Nuttall Encyclopædia Being a Concise and Comprehensive Dictionary of General Knowledge by P. Austin Nuttall

The motion of the bubble then measures double the inclination of this imaginary axis, or the deviation of a cylinder on which the level may rest from horizontality.

From Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" by Various

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