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English definition of “hydroxyl ion”

hydroxyl ion

noun [C]     /haɪˌdrɒk.sɪlˈaɪən/ US  /-ˈdrɑːk-/ specialized
an ion with a negative charge , consisting of an oxygen atom and a hydrogen atom Atoms, molecules and sub-atomic particles
(Definition of hydroxyl ion noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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