Dictionary

thorium

5 ENTRIES FOUND:

thorium

noun tho·ri·um \ˈthr-ē-əm\

Definition of THORIUM

:  a radioactive metallic element that is obtained especially from monazite and is usually associated with rare earths — see element table

Origin of THORIUM

New Latin, from Old Norse Thōrr Thor
First Known Use: 1832

thorium

noun tho·ri·um \ˈthōr-ē-əm, ˈthr-\   (Medical Dictionary)

Medical Definition of THORIUM

:  a radioactive metallic element that occurs combined in minerals and is usually associated with rare earths—symbol Th; see element table

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