candela

 
Pronunciation: /kanˈdɛlə, -ˈdiːlə, ˈkandɪlə/
(abbreviation: cd)

noun

Physics
  • the SI unit of luminous intensity. One candela is the luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency 540 × 1012 Hz and that has a radiant intensity in that direction of 1/ 683 watt per steradian.

Origin:

1950s: from Latin, 'candle'