【上位】 radiation consisting of waves of energy associated with electric and magnetic fields resulting from the acceleration of an electric charge 電荷の加速から生じる電磁場に関連したエネルギー波からなる放射。
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【下位】 (physics) electromagnetic radiation that can produce a visual sensation; "the light was filtered through a soft glass window" 視覚の感覚を生じさせる電磁放射。
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