Word · Frequency #17402
infrared
红外线；红外辐射
the infrared region of the electromagnetic spectrum; electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves
- 1.
The electromagnetic radiation of a wavelength longer than visible light, but shorter than microwave radiation, having a wavelength between 700 nm and 1 mm.
波长长于可见光但短于微波辐射的电磁辐射,波长介于700纳米至1毫米之间。
- 2.
A specific wavelength in this range.
该范围内的特定波长。
- 3.
A device that emits infrared radiation.
发射红外辐射的装置。
波长长于可见光但短于微波辐射的电磁辐射,波长介于700纳米至1毫米之间。；该范围内的特定波长。；发射红外辐射的装置。；红外线
In use
The rescue team used an infrared camera to find the missing hiker in the dark forest.
Infrared lamps are often placed in food warmers to keep dishes hot.
Some reptiles can see infrared light, which helps them locate warm prey.
infrared + noun
infrared 作形容词时通常放在名词前，如 infrared light（红外光）、infrared camera（红外摄像机）。
Infrared light is invisible to the human eye.
红外光是人眼看不见的。
in the infrared
作名词时常用在介词 in 后，表示“在红外区/红外波段”。
The telescope can observe in the infrared.
这台望远镜可以观测红外波段。
the infrared
作名词特指红外区或红外辐射时，要与定冠词 the 连用。
Connections
Collocations
- infrared radiation
- 红外辐射
- Infrared radiation is invisible to the human eye but can be detected as heat.红外辐射肉眼不可见，但可以作为热量被探测到。
- infrared sensor
- 红外传感器
- The security lights are activated by an infrared sensor.安全灯由红外传感器激活。
- infrared camera
- 红外摄像机
- Firefighters use an infrared camera to see through smoke.消防员使用红外摄像机穿透浓烟观察。
- infrared spectroscopy
- 红外光谱分析
- The chemist identified the compound using infrared spectroscopy.化学家利用红外光谱分析鉴定了该化合物。
- infrared light
- 红外光
- Infrared light is used in remote controls to send signals.红外光用于遥控器发送信号。
Learner notes
Memory Tip
记：infra-表“下”，red是红，红光“下面”看不见的光，就是红外线。
Context & Register
语域：neutral 常见场景：scientific literature、technical specifications、product documentation infrared 是比较中性的科技术语，通常出现在科学文献、技术规格或产品说明等语境中；日常口语中也会出现，但整体语体仍偏正式。
Pronunciation & Spelling
与 infrared 末尾 /rɛd/ 真正同韵的词：red、bed、bread、head。注意 hundred 和 tired 虽然也以 -red 拼写结尾，但发音不同：hundred /ˈhʌndrəd/，tired /ˈtaɪərd/。
Usage priority
Collins 词频等级为 1，建议结合例句记忆，而不是只背中文释义。
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.