Definition:Earth's Axis

Definition

Let it be assumed to be established that planet Earth rotates in space about a more-or-less fixed diameter $D$.

Then $D$ is known as Earth's axis.

Sources

• 1976: W.M. Smart: Textbook on Spherical Astronomy (6th ed.) ... (previous) ... (next): Chapter $\text I$. Spherical Trigonometry: $4$. Terrestrial latitude and longitude.