(physics) All of the physical laws of nature that account for the behaviour of the normal world, but break down when dealing with the very small (see quantum mechanics) or the very fast or very heavy (see relativity).

The branch of the modern military that is transported by light fast vehicles (including jeeps and helicopters), now serving the function historically provided by a horse cavalry.

(physics) Of, or relating to statistical mechanics.

(physics) Early classical mechanics as propounded by Isaac Newton, especially that based on his laws of motion and theory of gravity.

plural of Geneva mechanism

(mechanics) A mechanism that translates a continuous rotation into an intermittent rotary motion, using an intermittent gear where the drive wheel has a pin that reaches into a slot of the driven wheel and thereby advances it by one step, and having a raised circular blocking disc that locks the driven wheel in position between steps.

(physics) The sum of the potential energy and kinetic energy of a body or system

(astronomy) The dynamics of celestial bodies subject to mutual gravitational attraction.

(physics, mathematics) The mathematical basis for quantum mechanics in which light and subatomic particles have the characteristics of both waves and particles.

Any mechanical (or other) system used to keep one or more variable parameters constant, or within specified bounds.