| ____ oxide, chemical compound commonly known as laughing gas (7) |
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| The sort of oxide that's a real gas! (7) |
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| ___ oxide: laughing gas (7) |
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| _______ oxide: laughing gas (7) |
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| Laughing gas, familiarly |
LA Times Daily |
28 Jun 2020 |
| Laughing gas, familiarly |
The Washington Post |
28 Jun 2020 |
| Regarding gaseous element: within reason, it's first to react |
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| — oxide (anesthetic) |
Premier Sunday |
02 Dec 2018 |
| -- oxide (laughing gas) |
Premier Sunday |
05 Feb 2017 |
| Isn't our setting consisting of Nitrogen? |
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| Laughing gas, familiarly |
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| Dentistry number, familiarly |
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| Dentistry number, familiarly |
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| __ oxide: laughing gas |
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| __ oxide: laughing gas |
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| __ oxide (laughing gas) |
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| ___ oxide (compound that has 296 times the effect of 41-Across for producing global warming) |
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| Kind of acid |
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| _____ oxide |
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| __ oxide (laughing gas) |
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| Of a chemical compound |
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| Containing a certain salt. |
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