Definition of "vitriol" []

• See sulfuric acid. (noun)
• Any of various sulfates of metals, such as ferrous sulfate, zinc sulfate, or copper sulfate. (noun)
• Bitterly abusive feeling or expression. (noun)
• To expose or subject to vitriol. (verb-transitive)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The term vitriol is also an acronym for "Visita Interiora Terrae Rectificando Invenies Occultum Lapidem Visit the interior of the earth, and by rectifying you will find the hidden stone.""
• "Both suits are pending, with a hearing set for Oct. 14 in state Superior Court in Napa in one of the cases, but the vitriol is already flying."
• "Your vitriol is almost always concentrated on those not left ENOUGH."