iso·ce·rau·nic \| ̷ ̷(ˌ) ̷ ̷sə̇|rȯnik\adjective oriso·ke·rau·nic\-kə̇|-\ Etymology:isoceraunic from is- + ceraun- + -ic; isokeraunic from is- + keraun- (from Greek keraunos thunderbolt) + -ic — more at ceraun- : showing or having equal frequency or severity or simultaneous occurrence of thunderstorms < isoceraunic maps >