thorium dioxide

thorium-dioxide的词性：
n.（名词）

1. A heavy white powder, ThO₂, obtained from monazite and used mainly in ceramics, glass, and gas mantles and as a catalyst. Also called thoria
二氧化钍：一种从独居石中提取的白色粉末ThO₂，主要用于陶瓷、玻璃和灯罩及用作催化剂 也作 thoria