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nitrous oxide

noun

Definition of NITROUS OXIDE

: a colorless gas N₂O that when inhaled produces loss of sensibility to pain preceded by exhilaration and sometimes laughter and is used especially as an anesthetic in dentistry—called also laughing gas

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nitrous oxide

nitrous oxide

Definition of NITROUS OXIDE

Learn More About NITROUS OXIDE

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nitrous oxide

nitrous oxide

Definition of NITROUS OXIDE

Learn More About NITROUS OXIDE

Test Your Vocabulary

Name That Thing

True or False?

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The Merriam-Webster

Unabridged Dictionary

Learning English?

We can help.

Our Dictionary,On Your Devices

Visit Our Store

Join Us

Bookstore: Digital and Print

Other Merriam-Webster Dictionaries

Our Dictionary,
On Your Devices