A radioactive mineral consisting of thorium silicate

• It is a source of thorium that is found in coarse granite

Wikipedia Word definitions in Wikipedia
Thorite , (Th,U)SiO, is a rare nesosilicate of thorium that crystallizes in the tetragonal system and is isomorphous with zircon and hafnon . It is the most common mineral of thorium and is nearly always strongly radioactive . It was named in 1829 to reflect ...

WordNet Word definitions in WordNet
n. a radioactive mineral consisting of thorium silicate; it is a source of thorium that is found in coarse granite

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Thorite \Tho"rite\, n. [So called by Berzelius from the Scandinavian god Thor. See Thor .] (Min.) A mineral of a brown to black color, or, as in the variety orangite, orange-yellow. It is essentially a silicate of thorium.

Wiktionary Word definitions in Wiktionary
n. (context mineralogy English) A radioactive mineral, composed mostly of thorium silicate (thoriumsiliconoxygen 4 ), along with silicates of uranium and the rare earths.