imaginary axis

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

noun Mathematics.

the vertical axis in an Argand diagram.

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Origin of imaginary axis

First recorded in 1700–05
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021