an orange-red, water-insoluble, poisonous powder, As 4 S 4 , As 2 S 2 , or AsS, used chiefly in the manufacture of fireworks.
- Arsenic hour
noun the time of day when both children and parents have come home but dinner has not yet been served, seen as being difficult due to everyone being tired and hungry Examples ‘Arsenic hour’ was first used as a play on the words of Henry Wadsworth Longfellow’s poem “The Children’s Hour.”
- Arsenic trichloride
a colorless or yellow, oily, poisonous liquid, AsCl 3 , used chiefly as an intermediate in the manufacture of organic arsenicals.
- Arsenic trioxide
a white, tasteless, amorphous, slightly water-soluble, poisonous powder, As 2 O 3 , used chiefly in the manufacture of pigments and glass and as an insecticide or weed-killer; arsenous acid. noun a white poisonous powder used in the manufacture of glass and as an insecticide, rat poison, and weedkiller. Formula: As2O3 Also called arsenic
- Arsenic trisulfide
a yellow or red crystalline substance, As 2 S 3 , occurring in nature as the mineral orpiment, and used as a pigment (king’s yellow) and in pyrotechnics.