real axis

[ ree-uhl ak-sis, reel ]

noun

, Mathematics.

1. the horizontal axis in an Argand diagram.

Word History and Origins

Origin of real axis¹

First recorded in 1830–35

Example Sentences

“There will be a little bit of moisture from that, and the real axis is split between the Northwest, Southern California and parts of Baja California.”

From Los Angeles Times

What if the set doesn’t come in one convenient piece like the interval between 0 and 1 and it’s a collection of points scattered randomly about the real axis?

From Scientific American

Complex here doesn’t mean complicated but refers to the complex plane, a two-dimensional plane with a real axis and an imaginary axis, where complex numbers like 2+3i live.

From Scientific American

The axis Ox is often called the real axis, and the axis Oy the imaginary axis.

From Project Gutenberg

Herein the points a, b, ... of the real axis give rise to the corners of the polygon; the condition Σα = n − 2 ensures merely that the point t = ∞ does not correspond to a corner; if this condition be not regarded, an additional corner and side is introduced in the polygon.

From Project Gutenberg