The story
Named after its discoverer, the French physicist and mathematician Jean le Rond d'Alembert.
Etymology from Wiktionary, CC BY-SA 4.0.
d'Alembert's principle
Today it means: A statement of the fundamental classical laws of motion, generalizing the principle of virtual work from static to dynamical systems by introducing forces of inertia which, when added to the applied forces in a system, result in dynamic equilibrium. Full definition →