反はん射しゃ運うん動どう

noun

reflex action; reflex movement

Physiological term for an involuntary, automatic movement in response to a stimulus.

• 熱あついものに触ふれると、反はん射しゃ運うん動どうで手てを引ひっ込こめる。

  When you touch something hot, you pull your hand back by reflex action.

• 膝しつ蓋がい腱けん反はん射しゃは代だい表ひょう的てきな反はん射しゃ運うん動どうの一ひとつだ。

  The patellar reflex is one of the typical reflex movements.