constant

一定の、不変の

時間がたっても同じままで変化しない。

やさしい英語で： Staying the same over time.

• Keep the temperature constant.
• The car moved at a constant speed.
• Prices remained constant throughout the year.

類義語： steady, unchanging, fixed

反対語： variable, changing

よく使う表現： constant speed, constant temperature, remain constant, constant value

定数

計算やコンピュータープログラムの中で変わらない数や値。

やさしい英語で： A number or value that stays the same in a calculation or computer program.

• Five is a constant in this equation.
• The formula contains two constants and one variable.
• The program uses a constant for the maximum file size.

類義語： fixed value

反対語： variable

よく使う表現： mathematical constant, constant value, a positive constant

定数

科学的な性質を表す測定値で、一定の条件では変わらない数。

やさしい英語で： A measured number describing a scientific property that stays the same under particular conditions.

• The experiment gave us a new constant.
• This constant applies only at a fixed temperature.
• Scientists measured the physical constant with greater accuracy.

よく使う表現： physical constant, gas constant, universal constant