candela

/kænˈdiːlə/

IPA: /K AE0 N D EH1 L AH0/

noun
  1. 1

    In the International System of Units, the base unit of luminous intensity; the luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency 540 × 1012 hertz and that has a radiant intensity in that direction of 1/683 watt per steradian. Symbol: cd

Source: https://en.wiktionary.org/wiki/candela