Imaginary Line That Cuts the Earth in Half

This page is the CodyCross answer for the clue below from Under the sea, Group 27, Puzzle 5.

Question is: Imaginary Line That Cuts the Earth in Half

and the answer is: EQUATOR

Word Meaning:

EQUATOR — (geography, often “the Equator”) An imaginary great circle around Earth, equidistant from the two poles, and dividing earth's surface into the northern and southern hemispheres.

Definitions from Wiktionary.