mercuric sulfide

Dictionary: mercuric sulfide

n.
A poisonous compound, HgS, having two forms:

Black mercuric sulfide, a black powder obtained from mercury salts or by the reaction of mercury with sulfur, used as a pigment.
Red mercuric sulfide, a bright scarlet powder derived from heating mercury with sulfur, used as a pigment.

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Dictionary. The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved. Read