Enter a clue or pattern or both:
The Clue
Prime meridian std. (3 letter answer)
The Answer
GST
Tags
Notes
The answer GST is seen occasionally, appearing about once every 650 puzzles.
Related Clues
Comprehend
Clock std.
Astron. clock setting
Astronomer's calculation: Abbr.
Astronomer's time: Abbr.
Astronomical observation std.
Astronomer's std.
A Midwest time: Abbr.
Setting at 0 degrees long.
Standard setting at 0° long.
Standard setting at 0 degrees long.