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)
Celsius (previously Centigrade)
International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM