protoxide of nitrogen

Definition of protoxide of nitrogen

laughing gas, now called hyponitrous oxide<-, used as an anaesthetic in dentistry; now (1950-1996) called nitrous oxide, NO ->. See under Laughing.

See also: Protoxide

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Protoplasm
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Protoplasmic
Protoplast
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Protoplastic
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Protosilicate
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Protosulphide
Protosulphuret
Prototheria
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Protovertebral
Protoxide
-protoxide of nitrogen-
Protoxidize
Protozoa
Protozoan
Protozoic
Protozoon
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Protract
Protracted
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