| Another name for yttrium oxide (6) |
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| Oxide of a rare-earth element, a yellowish-white powder |
The Telegraph General Knowledge |
29 Apr 2018 |
| Powdery oxide, dry, turning light at the edges |
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| Oxide in incandescent gas mantles |
LA Times Daily |
24 Jul 2015 |
| Oxide in incandescent gas mantles |
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| Oxide used in picture tubes |
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| Oxide used in television tubes |
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| Powder used in lasers |
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| Oxide used in television tubes |
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| Powder used in television tubes |
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| Oxide of element 39 |
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| Yellowish powder used in ceramics |
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| White powder used in incandescent gas |
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| Rare-earth oxide |
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| Powder used in television tubes |
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| Powder used in color TV tubes |
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| Heavy, insoluble powder. |
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| Heavy white powder, in chemistry. |
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| White powder related to element 39 |
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