Hefner lamp en · NOUN
Etymology
Invented by Friedrich von Hefner-Alteneck in 1884.
Meanings
- A flame lamp used in photometry that burns amyl acetate and has been used as a standard for measuring luminosity in parts of Europe.
Forms
| Spelling | Features | Labels | Source |
|---|---|---|---|
| Hefner lamps | Number=Plur | lexicographic |