リフレクター

noun

reflector

A device or surface that reflects light, sound, or other radiation. Commonly used for safety reflectors on bicycles, cars, or clothing, as well as in photography and lighting equipment.

• 自じ転てん車しゃの後うしろにリフレクターを付つけることが法ほう律りつで義ぎ務む付づけられている。

  It is required by law to attach a reflector to the back of a bicycle.

• 夜や間かんのランニングには、リフレクター付つきのウェアを着ちゃく用ようすると安あん全ぜんだ。

  For running at night, it is safer to wear clothing with reflectors.