Word · Frequency #18249
supernatant
上清液；上层清液
核心释义
the clear liquid that lies above a sediment or precipitate
- 1.
沉淀物或析出物上方的液体
The liquid that lies above a sediment or precipitate.
- 2.
漂浮在液体表面的物质
Material that floats on the surface of a liquid.
沉淀物或析出物上方的液体；漂浮在液体表面的物质
用法In use
After the mixture was left to settle, the clear supernatant was poured off.
用法提示：此处为名词，指沉淀后上层的澄清液体。
The lab stored the supernatants in a freezer for later analysis.
用法提示：此处为名词复数形式，仍指离心或沉淀后的上层清液。
The supernatant liquid was collected without disturbing the sediment.
用法提示：此处为形容词，修饰 liquid，表示浮在沉淀上层的。
the supernatant
作名词时通常用定冠词，指离心或沉淀后上层的清液。
After centrifugation, the supernatant was carefully collected.
离心后，小心收集上层清液。
supernatant [noun]
作形容词修饰名词，常与 liquid、fluid、layer 等搭配。
相关词与表达Connections
搭配Collocations
- culture supernatant
- 培养上清液
- The culture supernatant was collected after centrifugation.离心后收集培养上清液。
- cell-free supernatant
- 无细胞上清液
- Cells were removed, and the cell-free supernatant was stored at -80°C.去除细胞后，将无细胞上清液储存在-80°C。
- supernatant fluid
- 上清液
- The supernatant fluid should be clear and free of debris.上清液应清澈，不含残渣。
- discard the supernatant
- 弃去上清液
- After centrifugation, carefully discard the supernatant without disturbing the pellet.离心后小心弃去上清液，不要扰动沉淀。
- collect the supernatant
学习提示Learner notes
记忆技巧Memory Tip
“super”在上 + “natant”漂浮 → 漂浮在上层的清液：离心后沉淀在下，上清液在上。
语境与语域Context & Register
语域：formal 常见场景：实验室、生物化学、医学检验 supernatant 是正式、专业的科技用词，通常出现在实验室报告、科研论文和医学检验中，日常口语很少使用。作名词时指上层清液，作形容词时指上层的；多用于书面和技术性说明。
发音与拼写Pronunciation & Spelling
真正押韵的是读音中以 /-eɪtənt/ 结尾的词，如 natant（/ˈneɪtənt/）和 latent（/ˈleɪtənt/）；supernatant 的重音在 -nat-，所以与它们同韵。tenant、important、consultant 虽然拼写有相似的 -tant/-ant 结尾，但读 /-ənt/，不押韵；super 只是开头拼写和读音相同。
一起学习词形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.