(physics) The original formulation of quantum mechanics in which the operators were represented by time-dependent matrices.

(physics) The branch of fluid mechanics that deals with the action of forces on gases.

(medicine) A form of physiotherapy used to correct body posture and movement.

(chemistry) A non-rigorous method of computing the structures, energies, and some properties of molecules by assuming they behave like small balls connected by springs.

(physics) classical or Newtonian mechanics rather than quantum mechanics.

(physics) The mechanics of objects moving at velocities considerably less than the speed of light.

(physics) The mechanics of objects moving at velocities comparable to the speed of light; is compatible with the special and general theories of relativity.

(physics) The study of the motion of individual particles.

The science that studies the mechanical behaviour of rock.

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