North according to the earth's axis, not magnetic north.
地轴真北（非磁北）
compass readings vary from 7.9° to 6.7° west of true north
Example sentencesExamples
There had been hopes that the variation of the compass - the angle between the directions of magnetic north and true north - might do the trick, since it was known to vary with position on the earth.
An example of the former is that the Bermuda Triangle lies on the 80° meridian, a line that is one of two places on Earth where the magnetic and true north poles are in perfect alignment.
During his expeditions in the Americas and Europe, he recorded and reported on magnetic declination - the angle between magnetic north and true north at a particular location.
Oddly, the surveyor used magnetic north in laying out the site, whereas the nearby streets were laid out on a true north bearing.
The eastern side of the Great Pyramid, for example, points only three arcminutes away from a true north - south line, and other pyramids in the group are not much worse.
Definition of true north in US English:
true north
nountru nɔrθ
North according to the earth's axis, not magnetic north.
地轴真北（非磁北）
compass readings vary from 7.9° to 6.7° west of true north
Example sentencesExamples
An example of the former is that the Bermuda Triangle lies on the 80° meridian, a line that is one of two places on Earth where the magnetic and true north poles are in perfect alignment.
During his expeditions in the Americas and Europe, he recorded and reported on magnetic declination - the angle between magnetic north and true north at a particular location.
There had been hopes that the variation of the compass - the angle between the directions of magnetic north and true north - might do the trick, since it was known to vary with position on the earth.
Oddly, the surveyor used magnetic north in laying out the site, whereas the nearby streets were laid out on a true north bearing.
The eastern side of the Great Pyramid, for example, points only three arcminutes away from a true north - south line, and other pyramids in the group are not much worse.