(astronomy): Coined by Bernard Oliver in 1971, in allusion to the idea that this part of the spectrum would be that used by extraterrestrial intelligence to communicate.
1907,Barbara Baynton, edited by Sally Krimmer and Alan Lawson,Human Toll (Portable Australian Authors: Barbara Baynton), St Lucia: University of Queensland Press, published1980, page268:
From habit the sheep would head for the river, but, though it was early spring, the winter had been droughty, and the river was only a string of dangerouswater-holes.
