|rādē(ˌ)ō+ noun
Etymology: New Latin, from radio- + thorium
: the radioactive isotope of thorium of mass number 228 formed from mesothorium 2 — symbol RdTh or Th 228 ; see thorium series
|rādē(ˌ)ō+ noun
Etymology: New Latin, from radio- + thorium
: the radioactive isotope of thorium of mass number 228 formed from mesothorium 2 — symbol RdTh or Th 228 ; see thorium series
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012