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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

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

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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

Of course only one end of this imaginary axis can be above our horizon.

From Half-hours with the Telescope Being a Popular Guide to the Use of the Telescope as a Means of Amusement and Instruction. by Proctor, Richard A. (Richard Anthony)

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

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.

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