qiang3
hydroxyl (radical)

strokes 13
radical
strokes after radical 7
羟基 羥基 qiang3 ji1
hydroxyl group -OH

羟基丁酸 羥基丁酸 qiang3 ji1 ding1 suan1
gamma-Hydroxybutyric acid, GHB

羟基磷灰石 羥基磷灰石 qiang3 ji1 lin2 hui1 shi2
hydroxy-apatite (phosphatic lime deposited in bone)

羟自由基 羥自由基 qiang3 zi4 you2 ji1
hydroxyl radical