ˈshilə(r) noun
( -s )
Etymology: German, play of colors, iridescence, from Middle High German schilher iridescent taffeta, from schilhen to squint, twinkle (from Old High German scilihen to squint) + -er; akin to Old English be scȳlan to look sidelong, Middle Low German schēlen to peer out; causative-denominatives from the root of Old English sceol wry, squinting — more at cylinder
1. : the bronzy iridescent luster of a mineral (as hypersthene or schiller spar) due to minute inclusions or cavities in parallel position and sometimes resulting from alteration
2. : lustrously or resplendently iridescent coloration (as of a beetle)