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nitrous oxide
1 ENTRIES FOUND:
nitrous oxide
(noun)
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nitrous oxide
/
ˈ
naɪtrəs-/
noun
nitrous oxide
/
ˈ
naɪtrəs-/
noun
Learner's definition of NITROUS OXIDE
[
noncount
]
:
a gas that is used by dentists to keep patients from feeling pain
—
called also
laughing gas
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