illuminant
/ɪˈl(j)uːmɪnənt
/noun technical
A means of lighting or source of light: until 1880, oil was the only illuminant in use...
- While in defensive situations illuminants can be most valuable, in offensive situations, their use for surveillance and target acquisition can be counter-productive.
- 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.
- Yes, there was a market for the refined illuminant.
adjective
Giving off light.The owner of the illuminant system was Mr WK Hardacre, of Hellifield House....
- 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.
- 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.
Origin
Mid 17th century: from Latin illuminant- 'illuminating', from the verb illuminare (see illuminate).
Rhymes
- hot-swappable
- hotsy-totsy
- hotte
- hot tear
- hot tearing
- hotted-up
- hot-tempered
- Hottentot
- Hottentot bean
- Hottentot bread
- Hottentot cherry
- Hottentotese
- Hottentot fig
- Hottentot god
- Hottentotish
- Hottentotism
- Hottentot pie
- Hottentot's bean
- Hottentot's bread
- Hottentot's cherry
- Hottentot's god
- Hottentot's head
- Hottentot's tea
- Hottentot tea
- Hottentottish