Meaning of ATOMIC NUMBER 33

WordNet Dictionary
	Definition:		[n]  a very poisonous metallic element that has three allotropic forms; arsenic and arsenic compounds are used as herbicides and insecticides and various alloys; found in arsenopyrite and orpiment and realgar
	Synonyms:		arsenic, As
	See Also:		arsenopyrite, chemical element, element, herbicide, insect powder, insecticide, mispickel, orpiment, realgar, weed killer, weedkiller