isophote
noun
iso·phote ˈī-sə-ˌfōt 
: a curve on a chart joining points of equal light intensity from a given source
isophotal
ˌī-sə-ˈfō-təl
adjective 
Word History
Etymology
International Scientific Vocabulary is- + -phote (from Greek phōt-, phōs light) — more at fancy
First Known Use
circa 1909, in the meaning defined above
- milled about or around
- millefeuilles
- millefiori
- millefioris
- millefleur
- millefleurs
- millegrain
- millenarian
- millenarianism
- millenarianisms
- millenarians
- millenaries
- millenarist
- millenarists
- millenary
- millennia
- millennial
- Millennial Church
- millennial dawn
- Millennial Dawnist
- millennialism
- millennialisms
- millennialist
- millennialists
- millennially