Definitions

1. adjective

Of or relating to the equator.

“The equatorial regions of the Earth experience a relatively constant temperature throughout the year.”

2. noun

A line or circle on a celestial globe or map representing the equator.

“The astronomer carefully measured the angle of the equatorial using a protractor.”

3. adverb

In the direction of or towards the equator.

“The ship sailed equatorially around the world, passing through the warm waters of the Pacific Ocean.”