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单词
thoria
释义
WordReference Random House Unabridged Dictionary of American English © 2024
tho•ri•a
(thôr
′
ē ə, thōr
′
-),
USA pronunciation
n.
[
Chem.
]
Chemistry
a white, heavy, water-insoluble powder, ThO
2
, used chiefly in incandescent mantles, as the Welsbach gas mantle. Also called
tho
′
rium ox
′
ide, tho
′
rium diox
′
ide.
thori
(
um
) + -
a
4
1835–45
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更新时间:2025/7/23 15:26:55