額がく帯たい鏡きょうがくたいきょうMeanings1nounhead mirrormedicineA concave mirror worn on a headband, used by doctors to focus light during examinations. Medical term.耳じ鼻び科かの先せん生せいは額がく帯たい鏡きょうを使つかって喉のどの奥おくを診しん察さつした。The ENT doctor used a head mirror to examine the back of the throat.