noun
Usage: usually capitalized E
1. : an equation in alternating-current theory: e ix =cos x+i sin x
2. : any of several differential equations of dynamics
noun
Usage: usually capitalized E
1. : an equation in alternating-current theory: e ix =cos x+i sin x
2. : any of several differential equations of dynamics
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012