from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A poisonous compound, HgS, having two forms.
- noun Black mercuric sulfide, a black powder obtained from mercury salts or by the reaction of mercury with sulfur, used as a pigment.
- noun Red mercuric sulfide, a bright scarlet powder occurring naturally or prepared by heating mercury with sulfur, that is sensitive to heat and light and is used as a pigment.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun inorganic chemistry The sulfide of
mercury, HgS, that occurs as the mineral cinnabar.
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