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Use "laughing-gas" in a sentence
"He snorted his distinctive, sneezy-wheezy, laughing-gas laugh."
"We get our smattering of science in the same way; we learn chemistry by listening to a short course of lectures enlivened by experiments, and when we have inhaled laughing-gas, seen green water turned to red, and phosphorus burnt in oxygen, we have got our smattering, of which the most that can be said is, that though it may be better than nothing, it is yet good for nothing."
"Those medicinal agents which prevent the feeling of pain, such as chloroform, ether, laughing-gas, etc."