Definitions For O

noun

• Rigid connective tissue that makes up the skeleton of vertebrates
• A mouth or mouthlike opening
• The left eye
• (computer science) software that controls the execution of computer programs and may provide various services
• A hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known
• The blood group whose red cells carry neither the A nor B antigens
• The 15th letter of the Roman alphabet
• 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
• The 15th letter of the English alphabet
• The number zero