Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun infrared

2 senses of infrared

Sense 1
infrared, infrared frequency -- (the infrared region of the electromagnetic spectrum; electromagnetic wave frequencies below the visible range; "they could sense radiation in the infrared")
       => frequency, frequence, oftenness -- (the number of occurrences within a given time period; "the frequency of modulation was 40 cycles per second"; "the frequency of his seizures increased as he grew older")

Sense 2
infrared, infrared light, infrared radiation, infrared emission -- (electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves)
       => actinic radiation, actinic ray -- (electromagnetic radiation that can produce photochemical reactions)

Antonyms of adj infrared

1 sense of infrared

Sense 1
infrared -- (having or employing wavelengths longer than light but shorter than radio waves; lying outside the visible spectrum at its red end; "infrared radiation"; "infrared photography")

INDIRECT (VIA invisible) -> visible, seeable -- (capable of being seen; or open to easy view; "a visible object"; "visible stars"; "mountains visible in the distance"; "a visible change of expression"; "visible files")

Similarity of adj infrared

1 sense of infrared

Sense 1
infrared -- (having or employing wavelengths longer than light but shorter than radio waves; lying outside the visible spectrum at its red end; "infrared radiation"; "infrared photography")
       => invisible (vs. visible), unseeable -- (impossible or nearly impossible to see; imperceptible by the eye; "the invisible man"; "invisible rays"; "an invisible hinge"; "invisible mending")