thorite
[θɔːraɪt]
Definitions
1. noun
A rare earth mineral, a radioactive isomorph of thallium sesquioxide.
“The geologist studied the properties of thorite found in the ore samples.”
2. proper noun
A lunar crater, approximately 74 km in diameter, located on the Moon’s surface.
“The astronauts navigated through the rugged terrain of the thorite crater.”