n."divination by means of a mirror," 1610s, from Latinized comb. form of Greek katoptron "mirror" (see catoptric) + -mancy. if (window.googletag) {googletag.cmd.push(function() { googletag.display('dcomMobileSERPDisplayTopAd-300x250'); });} else {console.error('googletag not defined, dcomMobileSERPDisplayTopAd-300x250');}