WordReference Random House Unabridged Dictionary of American English © 2026
Hef′ner can′dle
(hef′nər),USA pronunciation [Optics.]
- Opticsa German unit of luminous intensity, equal to 0.92 of a candela.
- named after French. von Hefner- Alteneck (1845–1904), German electrical engineer 1895–1900