One of the mysteries of the English language finally explained.
A means of lighting or source of light.‘until 1880, oil was the only illuminant in use’
lamp, light, flashlight, beaconView synonyms
- ‘When refined into kerosene, it was the only ‘cheap illuminant that burned in a bright, clean, safe manner,’ by far better than blubber and lard.’
- ‘Yes, there was a market for the refined illuminant.’
- ‘While in defensive situations illuminants can be most valuable, in offensive situations, their use for surveillance and target acquisition can be counter-productive.’
- ‘Also, only in the underwater optical environment do the illuminant and background change independently of each other, creating complex problems for crypsis.’
- ‘However, because the background radiance in the pelagic environment is a complex result of multiple scattering and absorption events, its spectrum changes independently of the illuminant.’
Giving off light.
- ‘Lexx casts an illumination spell so that they can all better see and they continue on with the glowing illuminant orb leading them.’
- ‘The XM930 contains a standard illuminant mix which provides approximately 1 million candlepower of light whereas the XM983 contains an infrared illuminant mix for use with standard night vision devices.’
- ‘The owner of the illuminant system was Mr WK Hardacre, of Hellifield House.’
- ‘Given the illuminant spectrum and the spectral sensitivity functions for the camera, we can calculate the estimates of the weights at each pixel from six sensor outputs.’
Mid 17th century: from Latin illuminant- ‘illuminating’, from the verb illuminare (see illuminate).
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