Tra từ infrared - Từ điển WordNet v3.1

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
• Syn:
infrared frequency
• Hypernyms:
frequency, frequence, oftenness
• Part Holonyms:
infrared spectrum
2. electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves
• Syn:
infrared light, infrared radiation, infrared emission
• Hypernyms:
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