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nitrous + noun
nitrous 作定语修饰名词；nitrous oxide（一氧化二氮）和 nitrous acid（亚硝酸）是常见化学术语。
Nitrous oxide is commonly used as an anesthetic in dentistry.
一氧化二氮常被用作牙科麻醉剂。
含氮的；氮的
先理解核心含义，再看它在真实句子里的用法。
含氮的；氮的
of or containing nitrogen
Nitrous oxide is commonly used as an anesthetic in dentistry.
一氧化二氮常被用作牙科麻醉剂。
氮的,与氮有关的,或由氮衍生的,尤指氮的化合价低于相应硝酸类物种中氮的化合价。
Of, relating to, or derived from nitrogen, especially in which the valence of the nitrogen is lower than that of a corresponding nitric species.
亚硝酸的,或与亚硝酸或其衍生物有关的。
Of or relating to nitrous acid or its derivatives.
具有类似氨或硝酸的刺激性气味的。
Having a sharp odor like ammonia or nitric acid.
The factory installed a filter to reduce nitrous fumes from its chimneys.
工厂安装了过滤器，以减少烟囱排放的含氮气体。
The laboratory test measured nitrous compounds in the water samples.
实验室检测测量了水样中的含氮化合物。
Some farmers choose nitrous fertilizers because they supply nitrogen to the soil.
一些农民选择含氮肥料，因为它们为土壤提供氮。
nitrous 作定语修饰名词；nitrous oxide（一氧化二氮）和 nitrous acid（亚硝酸）是常见化学术语。
Nitrous oxide is commonly used as an anesthetic in dentistry.
一氧化二氮常被用作牙科麻醉剂。
Not this
Nitrous is an element found in air.
Use this
Nitrogen is an element found in air.
nitrous 是形容词，意为“含氮的”，不能用作名词；指化学元素时应使用名词 nitrogen。
Not this
The dentist gave me nitrous before the operation.
Use this
The dentist gave me nitrous oxide before the operation.
nitrous 是形容词，不能单独作名词；指一氧化二氮（笑气）时，规范用法是完整短语 nitrous oxide。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
一氧化二氮；笑气
Nitrous oxide is used as a mild anesthetic in dentistry.
一氧化二氮在牙科中被用作温和的麻醉剂。
亚硝酸
Nitrous acid is generated when nitrites are acidified.
亚硝酸盐被酸化时生成亚硝酸。
亚硝烟气；氮氧化物烟雾
Workers were evacuated after nitrous fumes filled the plant.
氮氧化物烟雾弥漫工厂后，工人们被疏散了。
一氧化二氮镇静（笑气镇静）
Nitrous oxide sedation helps anxious patients stay calm during treatment.
一氧化二氮镇静能帮助焦虑的病人在治疗期间保持平静。
一氧化二氮气瓶
The nitrous oxide cylinder must be stored upright and secured.
一氧化二氮气瓶必须直立存放并固定好。
Use nitrous naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
nitrous 前几个字母 nitr 和 nitrogen（氮）很像，看到含 n 的它，就联想成“含氮的”。
语域：formal 常见场景：chemistry、technical writing、medicine 该词为技术/正式用词，通常出现在化学或科技文献中，多用于专业术语，如“nitrous oxide”（一氧化二氮）。日常口语中较少单独使用。
The pattern is the spelling ending -ous. Famous, nervous, dangerous and enormous are true matches for the final unstressed /əs/ of nitrous. Various and curious also contain -ous but add a /i/ glide, so they are only spelling matches. Be careful with citrous /ˈsɪtrəs/: it looks similar but has a different stressed vowel, so it does not rhyme.
Dictionary facts from ECDICT, WIKTIONARY.