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: T T- T. Ta Tb Tc Td Te Th Ti Tj Tk Tl Tm Tn To Tp Tr Ts Tt Tu Tv Tw Tx Ty Tz
thoria | thoriate | thoriated | thoric | thorite | thorium | thorium-228 | thorn | thorn apple | thorn-headed | thorn-tipped

thorium

 : 
Noun
 : 
tho=ri=um

CIDE DICTIONARY

thoriumn. [NL. See Thorite.].
     A metallic element found in certain rare minerals, as thorite, pyrochlore, monazite, etc., and isolated as an infusible gray metallic powder which burns in the air and forms thoria; -- formerly called also thorinum. Symbol Th. Atomic weight 232.0.  [1913 Webster]

OXFORD DICTIONARY

thorium, n. Chem. a radioactive metallic element occurring naturally in monazite, the oxide of which is used in gas-mantles.

Usage
Symb.: Th.
Etymology
Thor, Scand. god of thunder

For further exploring for "thorium" in Webster Dictionary Online


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