ハイドロキノンalso: ヒドロキノンハイドロキノンFreq.FrequencyTop 100,000Meanings1nounhydroquinonechemistry›A chemical compound used as a reducing agent, photographic developer, and skin-lightening agent.ハイドロキノンは写しゃ真しんの現げん像ぞう液えきに使つか