同どう時じ性せい

noun

simultaneity

Abstract noun referring to the property of two or more events occurring at the same time. Used in technical, philosophical, or everyday contexts.

• この実じっ験けんでは、二ふたつの反はん応のうの同どう時じ性せいが重じゅう要ようだ。

  In this experiment, the simultaneity of the two reactions is important.

• 同どう時じ性せいの概がい念ねんは、物ぶつ理り学がくでよく議ぎ論ろんされる。

  The concept of simultaneity is often discussed in physics.