(physics) The branch of physics which studies matter and energy at the level of atoms and other elementary particles, and substitutes probabilistic mechanisms in place of classical Newtonian ones.

(physics) The branch of physics that uses statistical laws to make theoretical predictions about macroscopic systems of particles.

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) 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).

(geology) a mechanical analogue of the seismic lithosphere, used to simulate the flexural deformations of the Earth

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

(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.

An electrolarynx.

plural of bio-mechanical