a white, tasteless, amorphous, slightly water-soluble, poisonous powder, As2O3, used chiefly in the manufacture of pigments and glass and as an insecticide or weed-killer; arsenous acid.
What’s the infamous chemical that makes NASA’s new life discovery so amazing, and why is it such a big deal?Few poisons are more notorious than arsenic. So, scientists were recently shocked to find that a strange bacterium called Halomonadaceae (a type of protobacteria) in Mono Lake, California, is actually thriving on it. The finding is blowing researchers’ minds, showing how much more there is to be discovered about the types of life forms that may exist both on Earth and in space. To give you an idea …
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- arsenic acid,
- arsenic disulfide,
- arsenic trichloride,
- arsenic trisulfide,
Also called arsenic.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
a white poisonous powder used in the manufacture of glass and as an insecticide, rat poison, and weedkiller. Formula: As 2 O 3Also called: arsenic
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012