Main Entry:vit·ri·olPronunciation: \ˈvi-trē-əl\ Function:noun Etymology:Middle English, from Anglo-French vitriole, from Medieval Latin vitriolum, alteration of Late Latin vitreolum, neuter of vitreolus glassy, from Latin vitreus vitreousDate:14th century
1 a: a sulfate of any of various metals (as copper, iron, or zinc)
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