Added 10 October 2026 megadyne noun Categories: Obscure Words noun ! Definition from Wiktionary (CC BY-SA). More about megadyne at Wordnik → Where our words come from → A unit of force equal to one million dynes Origin From mega- + dyne. From Wiktionary, via Kaikki.org (CC BY-SA) Related Words: kilodynedynemegadarafmegadecibelmillidarcykilodaltondeciseconddebyemillidarwindecimeterdecametre Back to today's word