Stroke 5 : The name for a part of a flash of lightning; the visible current of electricity that travels from a cloud to the ground. There can be many strokes in one flash of lightning
Masters of Disaster, Lightning Glossary, The American National Red Cross (and Arizona State University), Washington, DC, USA 2007. http://www.azpbs.org/mastersofdisaster/pdf/Lightni ng/LightningGlossary.pdf, (Lghtng Sfty - Amer) {865}