reflex

反射

自分で決めなくても体が素早く起こす反応。

やさしい英語で： A quick action your body makes without you deciding to do it.

• Blinking is a reflex.
• The doctor tested my knee reflex.
• Her quick reflexes helped her catch the falling cup.

類義語： automatic response

よく使う表現： knee reflex, automatic reflex, test a reflex

反射光、反射像

表面で跳ね返った光や、そこに映る像。

やさしい英語で： An image or light sent back from a surface.

• A faint reflex lit the shaded wall.
• The painter added a warm reflex beneath the chin.
• The mirror cast a bright reflex onto the ceiling.

類義語： reflection

よく使う表現： reflex of light, bright reflex

反射的な

意識して決めることなく、体の素早い反応として起こる。

やさしい英語で： Happening as a quick bodily response, without a conscious decision.

• Pulling your hand away is a reflex action.
• The sudden noise caused a reflex movement.
• Doctors checked whether his reflex responses were normal.

類義語： automatic, involuntary

反対語： voluntary

よく使う表現： reflex action, reflex response, reflex movement

優角の

180度より大きく、360度より小さい角を表す。

やさしい英語で： Describing an angle greater than 180 degrees and smaller than 360 degrees.

• An angle of 270 degrees is reflex.
• Measure the reflex angle shown here.
• The diagram contains two reflex angles.

類義語： re-entrant

よく使う表現： reflex angle, a reflex angle