Word · Frequency #17793
methyl
甲基
the univalent radical CH3- derived from methane
- 1.
The univalent hydrocarbon radical, CH3-, formally derived from methane by the loss of a hydrogen atom; a compound or part of a compound formed by the attachment of such a radical.
甲基,一种单价烃基(CH3-),形式上由甲烷失去一个氢原子衍生而来；指含有此类基团的化合物或其部分。
甲基,一种单价烃基(CH3-),形式上由甲烷失去一个氢原子衍生而来；指含有此类基团的化合物或其部分。；甲基；[化] 甲基
In use
The chemist explained that methyl is the group that makes this compound reactive.
In this reaction, two methyls join the carbon chain at different positions.
The student's model shows a methyl placed on the third carbon atom.
methyl + noun
methyl 常作定语修饰名词，构成化合物名称，如 methyl alcohol、methyl chloride。
Methyl chloride is a common reagent in organic chemistry.
甲基氯是有机化学中的一种常见试剂。
number + methyls
在化学语境中，methyl 可作可数名词，复数形式为 methyls，指多个甲基（基团）。
The molecule contains two methyls attached to the ring.
该分子含有两个连接在环上的甲基。
Common mistakes
Methyl is a gas.Methane is a gas.
甲基（methyl）指CH3-一价基团，不是一种可存在的独立气体；表示天然气的主要成分CH4时，应使用甲烷（methane）。用词混淆是因为两者中文中都含“甲”且都来自“meth-”词根，但具体所指不同。
Methyl is used as a fuel.Methanol is used as a fuel.
甲基（methyl）是基团，不是可燃烧的化合物；燃料或工业酒精是甲醇（methanol，CH3OH）。此处应使用甲醇，以避免把基团与具体物质混为一谈。
Connections
Collocations
- methyl group
- 甲基（基团）
- The methyl group has the formula CH3.甲基的化学式为CH3。
- methyl alcohol
- 甲醇
- Methyl alcohol is a flammable liquid.甲醇是一种易燃液体。
- methyl bromide
- 溴甲烷；甲基溴
- Methyl bromide was once used to fumigate soil.溴甲烷曾被用来熏蒸土壤。
- methyl mercury
- 甲基汞
- Methyl mercury can build up in fish.甲基汞会在鱼类体内累积。
- methyl orange
- 甲基橙
- Methyl orange turns red in acid.甲基橙在酸中变红。
- methyl methacrylate
- 甲基丙烯酸甲酯
Learner notes
Memory Tip
记忆：methyl 像 methane（甲烷）少一个氢，留下的一价基团就是甲基。
Context & Register
语域：formal 常见场景：化学实验室、科学文献 甲基是化学术语，通常用于学术或专业语境，日常口语中很少出现。
Pronunciation & Spelling
True rhyme: ethyl /ˈeθɪl/ (matching stressed vowel and final /θɪl/). The meth- words (methane, methanol, method) share the opening spelling and sound with methyl but have different endings, so they do not rhyme. Ethyl is sometimes pronounced /ˈiːθaɪl/ in various contexts, so be aware of regional or register differences.
Learn the forms together
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY.