See under mercuric sulfide.
a crystalline, water-insoluble, poisonous compound, HgS, occurring as a coarse, black powder (black mercuric sulfide) or as a fine, bright-scarlet powder (red mercuric sulfide) used chiefly as a pigment and as a source of the free metal.
noun Usage Note Contemporary Examples My $295 Skype Exorcism Scott Bixby February 5, 2014 Historical Examples Astounding Stories of Super-Science, August 1930 Various The Man Who Saw the Future Edmond Hamilton Wandl the Invader Raymond King Cummings Islands of Space John W Campbell Two Thousand Miles Below Charles Willard Diffin The Ethical Engineer Henry Maxwell […]
bread mold. any fungus of the family Mucoraceae, especially Rhizopus nigricans, that forms a black, furry coating on foodstuffs.
a jet-black molly, a color form especially of Poecilia latipinna or P. sphenops, popular as an aquarium fish.
income earned surreptitiously or illegally, usually in cash, and not reported to the government so as to avoid paying taxes on it. noun that part of a nation’s income that relates to its black economy any money that a person or organization acquires illegally, as by a means that involves tax evasion (US) money to […]