noun Etymology: New Latin, from Old Norse Thōrr Thor Date: 1832 a radioactive metallic element that is obtained especially from monazite and is usually associated with rare earths
THORIUM
Meaning of THORIUM in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012