Candela

**Semantic type:** Quantitative Concept

**Definition:** A unit of luminous intensity, one of the seven base units of the International System of Units (Systeme International d'Unites, SI). It is the luminous intensity in a given direction of a small monochromatic light source at 540 terahertz emitting 1/683 watt per steradian in that direction. This is dependent upon the definitions of the meter, kilogram, and second.

**Synonyms:** - candela - candela - cd - cd - cd - cd - cd - cd