The Prime One Is Located at 0 Degrees Longitude
This page is the CodyCross answer for the clue below from Brazilian Tour, Group 774, Puzzle 3 (Anderson Silva).
Question is: The Prime One Is Located at 0 Degrees Longitude
and the answer is: MERIDIAN
Word Meaning:
MERIDIAN — In full celestial meridian: a great circle passing through the poles of the celestial sphere and the zenith for a particular point on the Earth's surface.
Definitions from Wiktionary.