arsenic trioxide

Noun

 * 1)  An industrially important and highly toxic oxide of arsenic that occurs as the mineral claudetite; formula As2O3 (though in liquid, gaseous and some solid forms it has molecules of the form As$4$O$6$).

Usage notes
Often colloquially called simply arsenic as the common form in such things as old style rat poison.

Translations

 * Finnish: ,
 * Hungarian:
 * Polish:
 * Romanian:
 * Spanish: trióxido de arsénico
 * Swedish: