coruscation

2001, Oliver Sacks, Uncle Tungsten: Memories of a Chemical Boyhood, Alfred A. Knopf (2001), 6, All of these things—the rubbed amber, the magnets, the crystal radio, the clock dials with their tireless coruscations—gave me a sense of invisible rays and forces, a sense that beneath the familiar, visible world of colors and appearances there lay a dark, hidden world of mysterious laws and phenomena.