Standard Illuminant
From International Dictionary of Marine Aids to Navigation
2-1-455
A colorimetric illuminant, the spectral energy distribution of which is specified by the C.I.E., with various scientific applications in view.
Reference: C.I.E. (modified)
Note: For further details, see Reference: C.I.E.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
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