# Hefner lamp

> English word · Noun

## Definitions
1. A flame lamp used in photometry that burns amyl acetate and has been used as a standard for measuring luminosity in parts of Europe.

## Etymology
Invented by Friedrich von Hefner-Alteneck in 1884.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/hefner-lamp