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Từ điển Oxford Learners Wordfinder Dictionary

I - noun
1. the infrared region of the electromagnetic spectrum;
electromagnetic wave frequencies below the visible range (Freq. 1)
- they could sense radiation in the infrared
infrared frequency
frequency, frequence, oftenness
Part Holonyms:
infrared spectrum
2. electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves
infrared light, infrared radiation, infrared emission
actinic radiation, actinic ray

II - adjective
having or employing wavelengths longer than light but shorter than radio waves;
lying outside the visible spectrum at its red end (Freq. 2)
- infrared radiation
- infrared photography
Similar to:
invisible, unseeable

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