sferics / spherics [ˈsfɛrɪks]
sferics – n – 1. atmospherics; 2. the study of atmospherics; especially, the locating, tracking, and evaluating of natural electrical discharges
spherics – n – the doctrine of the sphere; the science of the properties and relations of the circles, figures, and other magnitudes of a sphere, produced by planes intersecting it; spherical geometry and trigonometry