秒びょう角かくびょうかくMeanings1nounarcsecond; second of arcUnit of angular measurement equal to 1/3600 of a degree. Used in astronomy, geodesy, and optics.この望ぼう遠えん鏡きょうの分解能かいぞうのうは0.1秒びょう角かくです。The resolution of this telescope is 0.1 arcseconds.
