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international candle

noun Optics.

candle(def 3b).
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for international candle

international candle

noun

a former international unit of luminous intensity, originally defined in terms of a standard candle and later in terms of a pentane-burning lamp. It has now been replaced by the candela
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012