vit·ri·ol

[vi-tree-uhl] noun, verb, vit·ri·oled, vit·ri·ol·ing or ( especially British ) vit·ri·olled, vit·ri·ol·ling.
noun
1.
Chemistry. any of certain metallic sulfates of glassy appearance, as copper sulfate or blue vitriol, iron sulfate or green vitriol, zinc sulfate or white vitriol, etc.
2.
oil of vitriol; sulfuric acid.
3.
something highly caustic or severe in effect, as criticism.
verb (used with object)
4.
to treat with or as with vitriol, especially sulfuric acid.

Origin:
1350–1400; Middle English < Medieval Latin vitriolum, vitreolum, equivalent to Latin vitre(us) vitreous + -olum, neuter of -olus -ole1

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00:10
Vitriol is always a great word to know.
So is fluoride. Does it mean:
pertaining to an aromatic compound, which contains one or more benzene or equivalent heterocyclic rings: many such compounds have an agreeable odor
a salt of hydrofluoric acid consisting of fluorine, as sodium fluoride, NaF, or a compound containing fluorine, as methyl fluoride, CH3F
Collins
World English Dictionary
vitriol (ˈvɪtrɪˌɒl) [Click for IPA pronunciation guide]
 
n
1.  another name for sulphuric acid
2.  any one of a number of sulphate salts, such as ferrous sulphate (green vitriol), copper sulphate (blue vitriol), or zinc sulphate (white vitriol)
3.  speech, writing, etc, displaying rancour, vituperation, or bitterness
 
vb , -ols, -oling, -oled, -olling, -olled
4.  to attack or injure with or as if with vitriol
5.  to treat with vitriol
 
[C14: from Medieval Latin vitriolum, from Late Latin vitriolus glassy, from Latin vitrum glass, referring to the glossy appearance of the sulphates]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

vitriol
late 14c., "sulphate of iron," from O.Fr. vitriol (13c.), from M.L. vitriolum "vitriol," from neut. of vitriolus, from L.L. vitreolus "of glass," from L. vitreus "of glass, glassy," from vitrium "glass" (see vitreous). So called from its glassy appearance in certain states.
Meaning "bitter or caustic feelings" first attested 1769, in allusion to the corrosive properties of vitriol.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

vitriol vit·ri·ol (vĭt'rē-ōl', -əl)
n.

  1. Any of various sulfates of metals, such as ferrous sulfate, zinc sulfate, or copper sulfate.

  2. See sulfuric acid.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
vitriol   (vĭt'rē-ōl', -əl)  Pronunciation Key 
  1. A former name for sulfuric acid.

  2. Any of various sulfates of metals, such as ferrous sulfate (green vitriol), zinc sulfate, or copper sulfate (blue vitriol). See also blue vitriol.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
For his sake, she drops the vitriol, whereupon he returns to her hometown to
  mediate a strike in her father's factory.
Your vitriol over someone's opinion is misplaced and unhealthy.
In the meantime there are hundreds of people boiling with rage and vitriol
  towards her.
Meanwhile put the vitriol water into the vessel with the logwood and again- put
  in the cloth and scald it fifteen minutes longer.
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