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Infrared vs Infra - What's the difference?

infrared | infra |

As nouns the difference between infrared and infra

is that infrared is electromagnetic radiation of a wavelength longer than visible light, but shorter than microwave radiation, having a wavelength between 700 nm and 1 mm while infra is (civil engineering|informal) infrastructure.

As an adjective infrared

is having the wavelength in the infrared.

As an adverb infra is

(legal) used to refer to something discussed later.

infrared

English

(wikipedia infrared)

Noun

(en noun)
  • electromagnetic radiation of a wavelength longer than visible light, but shorter than microwave radiation, having a wavelength between 700 nm and 1 mm

    • Adjective

    (-)
  • Having the wavelength in the infrared.
    • infrared light
    infrared waves
    infrared radiation
  • In the infrared spectrum.

    • Derived terms

    * infrared astronomy * infrared camera * infrared detector * infrared divergence * infrared film * infrared filter * infrared fixed point * infrared homing * infrared imagery * infrared lamp * infrared microscope * infrared motion detector * infrared multiphoton dissociation * infrared photography * infrared pointer * infrared port * infrared radiation * infrared remote control * infrared repellor * infrared sauna * infrared spectroscopy * infrared thermometer

    infra

    English

    Etymology 1

    Borrowed from (etyl) , below

    Adverb

    (-)
  • (legal) Used to refer to something discussed later.
    • Antonyms
    * supra
    Derived terms
    * infra dig

    Etymology 2

    Shortened form of infrastructure

    Noun

    (en noun)
  • (civil engineering, informal) Infrastructure.

    • Anagrams

    * ----