Definition: A dark-gray, metallic element of widespread distribution but occurring in small amounts; atomic number, 22; atomic weight, 47.90; symbol, Ti; specific gravity, 4.5; used for fixation of fractures. (Dorland, 28th ed)
titanium dioxide [ Titania,anatase,anatase titanium dioxide,brookite,nano-TiO2,nano-anatase,rutile,titanium oxide ] used medically as protectant against externally caused irritation & sunlight; high concentrations of dust may cause irritation to respiratory tract; RN given refers to titanium oxide (TiO2); structure