羟自由基 Traditional form: 羥自由基 Pinyin (reading): qiǎngzìyóujī Definitions: hydroxyl radical Characters: 羟 - hydroxide 自 - self; private, personal; from 由 - cause, reason; from 基 - foundation, base Traditional characters: 羥 - hydroxide 自 - self; private, personal; from 由 - cause, reason; from 基 - foundation, base