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Definition of Titanium dioxide
1. Noun. A white powder used as a pigment for its high covering power and durability.
Medical Definition of Titanium dioxide
1. TiO2;contains not less than 99.0% and not more than 100.5% of TiO2, calculated on the dry basis; used in creams and powders as a protectant against external irritations and solar rays. (05 Mar 2000)