Word · Frequency #18116
lumens
流明
lumens is the plural of lumen.
lumen
- 1.
In the International System of Units, the derived unit of luminous flux; the light that is emitted in a solid angle of one steradian from a source of one candela. Symbol: lm.
- 2.
The cavity or channel within a tube or tubular organ.
- 3.
The cavity bounded by a plant cell wall.
- 4.
The bore of a tube such as a hollow needle or catheter.
腔；管腔；腔；[医] 腔；流明(光通单位)
In use
Check the box for lumens: an ordinary 100-watt bulb gives about 1,600 lumens.
This tiny lamp produces only one lumen, so it is more decorative than useful.
The new projector has 2,800 lumens, so we can use it in a bright room without closing the curtains.
the lumen of [organ]
此用法中 lumen 指解剖学上的‘腔’或‘管腔’，常用单数。
The surgeon carefully removed the blockage from the lumen of the bile duct.
外科医生小心地清除了胆管管腔中的堵塞物。
[number] lumens
lumen 作光通量单位时，复数通常写作 lumens，也可写作 lumina。
A typical 60-watt incandescent bulb gives about 800 lumens.
一只普通60瓦白炽灯大约发出800流明的光。
lumens per [unit]
Connections
Collocations
- lumen output
- 流明输出（光通量）
- This lamp has a lumen output of 800.这盏灯的流明输出为800流明。
- lumens per watt
- 每瓦流明（光效）
- These LED bulbs can produce 120 lumens per watt.这些LED灯泡每瓦可以产生120流明。
- measured in lumens
- 以流明为单位测量
- Luminous flux is measured in lumens.光通量以流明为单位测量。
- intestinal lumen
- 肠腔
- The capsule camera travels through the intestinal lumen.胶囊摄像头穿过肠腔。
- vascular lumen
- 血管腔
- The stent helps keep the vascular lumen open.支架有助于保持血管腔通畅。
Pop culture & quotes
Learner notes
Memory Tip
记忆：lumen 音近中文“流明”（光通量单位）；再想象光流经管腔，就顺带记住它还有“腔”的意思。
Context & Register
语域：mixed 常见场景：灯具参数、照明设计、物理/光学说明 作“流明”（光通量单位）解时，lumen 多出现在灯具参数、照明设计和物理光学等技术性语境中，也较常见于日常讨论灯泡亮度时。整体属于中性偏正式的科技词汇，具体正式程度会随使用环境变化。
Pronunciation & Spelling
「illumine」（/ɪˈluːmɪn/）与「lumen」（/ˈluːmɪn/）真正押韵：重读元音 /uː/ 及后面的 /mɪn/ 相同。「specimen」和「women」词尾都拼作 -men、读作 /mɪn/，但重读元音不同，不算押韵。「abdomen」「omen」「rumen」是拼写上的形似词（都以 -men 结尾），读音都不同于「lumen」。
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.