Second

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Related to Arc seconds: Milliarcsecond

Second

1. See: Second mortgage.

2. See: Second round.
References in periodicals archive ?
If you ask a scope manufacturer what the Arc Seconds of resolution of a particular scope is, you might get an answer of 5 Arc Seconds.
Laser beam accuracy is within 2 arc seconds and repeatability is within 1 arc second.
We drew on our experience integrating more than 550 payloads to achieve alignments on the spacecraft platform within arc seconds (one arc second equals 1/3,600 degree).
The separation is 8 arc seconds and the position angle 212.
The 360,000-position NC table offers an indexing accuracy of [+ or -]7 arc seconds and an indexing repeatability of [+ or -]3.