nitrogen dioxide

/ˌnaɪtrədʒən daɪˌɑkˈsaɪd/
IPA guide

Definitions of nitrogen dioxide
  1. noun
    a highly poisonous brown gas (NO2)
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    type of:
    dioxide
    an oxide containing two atoms of oxygen in the molecule
    gas
    a fluid in the gaseous state having neither independent shape nor volume and being able to expand indefinitely
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