exacandelacommon nounSyllable DecompositionexacandelaEtymologyexpandderived from candela with the prefix exa-.Definition1. Unit of measurement of luminous intensity in the International System of Units (SI), equal to 10^18 candelas, and whose symbol is Ecd.extremely raremétrologiephysiqueexpandTranslationsgerman:Exacandelaenglish:exacandelaspanish:exacandelaitalian:exacandelajapanese:エクサカンデラ