Definition of "mercuric sulfide" []

• 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 derived from heating mercury with sulfur, used as a pigment. (noun)

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.