固こ有ゆう時じ

noun

proper time

Technical term in relativity: the time measured by a clock moving along a given world line.

• 固こ有ゆう時じは相そう対たい性せい理り論ろんにおける重じゅう要ような概がい念ねんだ。

  Proper time is an important concept in the theory of relativity.