thorium
noun/ˈθɔːɹiəm/
Etymology From Thor + -ium.
1
Usually A chemical element (symbol Th) with atomic number 90. A weakly radioactive, malleable, moderately hard silvery metal that tarnishes black when exposed to air.
- Synonyms
- thorinum
- Derived terms
29 terms
althupite, dithorium, eka-thorium, mesothorium, nonthorium, organothorium, radiothorium, thorate, thoria, thorian, thoriate, thoriated, thoric, thoriferous, thorinic, thorium-228, thorium-230 dating, thorium chloride, thorium dioxide, thorium emanation, thorium lead, thorium nitrate, thorium oxide, thorium series, thorium sulfate, thorium sulphate, thoron, trithorium, uranium-thorium dating- Related terms
- Thor, thorite, thorotrast