Frauenhofer's line

English

Noun

Frauenhofer's line (plural Frauenhofer's lines)

1. Alternative form of Fraunhofer line
   • 1913, Arthur Conan Doyle, “The Blurring of the Lines”, in The Poison Belt […], London; New York, N.Y.: Hodder and Stoughton, →OCLC, page 7:

     I have read with amusement, not wholly unmixed with some less complimentary emotion, the complacent and wholly fatuous letter of James Wilson MacPhail which has lately appeared in your columns upon the subject of the blurring of Frauenhofer's lines in the spectra both of the planets and of the fixed stars.