総そう質しつ量りょう

noun

total mass

Technical term used in physics, astronomy, and engineering to refer to the combined mass of a system or object.

• この銀ぎん河がの総そう質しつ量りょうは太たい陽ようの約やく一いっ兆ちょう倍ばいと推すい定ていされている。

  The total mass of this galaxy is estimated to be about one trillion times that of the sun.