arcsecond |
subarcsecond |
As a noun arcsecond
is a unit of angle; 1/60th of an arcminute, or 1/3600th of a degree.
As an adjective subarcsecond is
describing an angle having a value less than one arcsecond.
arcsecond |
millarcsecond |
As nouns the difference between arcsecond and millarcsecond
is that
arcsecond is a unit of angle; 1/60th of an arcminute, or 1/3600th of a degree while
millarcsecond is (astronomy) a unit of angle equal to one thousandth of an arcsecond.
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