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Definition of “nitrogen dioxide” - English Dictionary

"nitrogen dioxide" in British English

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nitrogen dioxidenoun [U]

uk   /ˌnaɪ.trə.dʒən daɪˈɒk.saɪd/  us   /ˌnaɪ.trə.dʒən daɪˈɑːk.saɪd/ specialized
a poisonous brown gas, formed when some metals dissolve in nitric acid
(Definition of nitrogen dioxide from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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