Word:

radiothorium

ra`di`o`tho´ri`um   Pronunciation: rā`dĭ`ǒ`thôr´ē`ŭm
n.1.(Chem.) an earlier name for the thorium isotope thorium-228, given by its discoverer Otto Hahn. It is a radioactive substance formed as one of series of products in the chain of radioactive decay of thorium. Its immediate predecessor in the chain is Actinium-228, and it decays by alpha emission to radium-224 with a half-life of 1.91 years. The name radiothorium was given prior to the full understanding of the nature of isotopes of elements.
Noun1.radiothorium - radioactive isotope of thorium with mass number 228
Synonyms: thorium-228
atomic number 90, Th, thorium, thorium-228
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Radiopticon
Radioscopy
radiosensitive
radiosensitivity
radiosity
Radiotelegram
Radiotelegraph
Radiotelegraphic
radiotelegraphic signal
Radiotelegraphy
Radiotelephone
radiotelephonic
radiotelephony
radiotherapist
Radiotherapy
radiotherapy equipment
-- radiothorium --
radious
Radish
Radish fly
radish plant
Radium
radium therapy
Radius
Radius bar
radius of curvature
Radius of gyration
Radius vector
Radix
radome
Radon
Radoub
RADSL
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