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thoraces
thoracic
thoracic duct
thoraco-
thoracolumbar
thoracotomy
thorax
Thorazine
thoria
thorianite
thorite
thorium
thorium dioxide
thorium series
thorn
thorn apple
thornback
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thoria
tho·ri·a [ tháwree ə ]


noun 
Definition:
 
chemistry 
Same as  thorium dioxide
[Mid-19th century. <thorium, after magnesia]
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