Wiktionary
n. (context chemistry English) a brilliant white powder, TiO2, used as a pigment, and in sunblock, toothpaste and cosmetics
WordNet
n. a white powder used as a pigment for its high covering power and durability [syn: titanium oxide, titanic oxide, titania]
Wikipedia
Titanium dioxide, also known as titanium(IV) oxide or titania, is the naturally occurring oxide of titanium, chemical formula . When used as a pigment, it is called titanium white, Pigment White 6 (PW6), or CI 77891. Generally it is sourced from ilmenite, rutile and anatase. It has a wide range of applications, from paint to sunscreen to food colouring. When used as a food colouring, it has E number E171.
Usage examples of "titanium dioxide".
Most of them contain titanium dioxide in a variety of densities, meaning some are a semidull luster, others dull, a few bright.
The fiber looked like a blotchy twisted ribbon, its varying shades of bright orange lightly peppered with black particles of titanium dioxide.