aurora
n
1 au,rora bore`alis (also the northern lights) bands of coloured light, mainly red and green, seen in the sky at night near the North Pole and caused by electrical radiation 北极光(在北极上空夜晚可见由电辐射产生的带状彩色光, 以红绿为主).
2 au,rora au`stralis similar lights seen in the southern hemisphere 南极光(在南半球可见的类似的光).