"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 c"
"the 15th letter of the Roman alphabet"
"the blood group whose red cells carry neither the A nor B antigens"
"a mouth or mouthlike opening"
"a hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known"
"the left eye"
"rigid connective tissue that makes up the skeleton of vertebrates"