a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth's crust
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
a white powdered poisonous trioxide of arsenic; used in manufacturing glass and as a pesticide (rat poison) and weed killer
a fluid necessary for the life of most animals and plants; "he asked for a drink of water"
binary compound that occurs at room temperature as a clear colorless odorless tasteless liquid; freezes into ice below 0 degrees centigrade and boils above 100 degrees centigrade; widely used as a solvent
once thought to be one of four elements composing the universe (Empedocles)
secrete or form water, as tears or saliva; "My mouth watered at the prospect of a good dinner"; "His eyes watered"
supply with water, as with channels or ditches or streams; "Water the fields"