Definition of Ringelmann in English:

Ringelmann

noun

  • Used attributive and (now rare) in the genitive with reference to a method of estimating the darkness and density of smoke by visual comparison with a chart bearing different shades of grey (formed by lines ruled with different spacings or different thicknesses); especially in "Ringelmann chart".

Origin

Late 19th century. From the name of Maximilien Ringelmann, French professor of agricultural engineering, who devised the method.

Pronunciation

Ringelmann

/ˈrɪŋɡlman/