arcsecond

Noun
  1. A 60th part of a minute of arc (synset 113632638)
    "the treasure is 2 minutes and 45 seconds south of here"
    is a type of: angular unit - a unit of measurement for angles
    is a part of: arcminute, minute, minute of arc - a unit of angular distance equal to a 60th of a degree
    same as: second

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