a radio wave, generated by lightning, high-energy electrons, etc. that travels along the earth's magnetic field lines and is heard as a whistling sound on radio receivers
James Abbott McNeill 1834-1903; U.S. painter & etcher in England
See whistler in American Heritage Dictionary 4
One that whistles: a whistler of popular tunes.
a. A marmot (Marmota caligata) of the mountains of northwest North America, having a grayish coat and a shrill, whistling cry.
b. Any of various birds that produce a whistling sound.
c. A horse having a respiratory disease characterized by wheezing.
Physics An electromagnetic wave of audio frequency produced by atmospheric disturbances such as lightning, having a characteristically decreasing frequency responsible for a whistling sound of descending pitch in detection equipment.
American painter whose subtle coloring and tonal harmony were influenced by musical aesthetics and Japanese art. His works include a portrait of his mother, entitled Arrangement in Grey and Black (1872).