The SI Unit: of luminous flux. It is the luminous flux emitted within Unit: solid angle (one steradian) by a point source having a uniform luminous intensity of one candela. Definition adopted by the 9th General Conference on Weights and Measures (1948).
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
International System of Units
Celsius (previously Centigrade)
International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM