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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 POP′ is the imaginary axis about which the star-sphere appears to revolve, and P and P′ are the poles of the heavens.

From Astronomical Lore in Chaucer by Grimm, Florence M.

The column of light is not the Milky Way—which is neither straight, nor like a rainbow—but the imaginary axis of the earth.

From The Republic by Jowett, Benjamin

Purkinje noticed that the position of the imaginary axis of rotation depends on the axis around which the head revolves.

From Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 7 "Equation" to "Ethics" by Various

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