(physics) the splitting and shift of a spectral line into several components in the presence of an electric field

(sociology) the observation that people often do or believe what they think many other people do.

(physics) The generation of an electric current in an intermetallic semiconductor in a magnetic field by the action of light.

(physics) The emission of electrons from the surface of a material following the absorption of electromagnetic radiation.

An artificially created or enhanced sound, used to accompany the action of a dramatic production, such as a film, play or video game

(ecology) The negative population growth observed at low population densities.

(physics) The visible scattering of light along the path of a beam caused by discontinuities such as suspended particles.

(physics) The tendency of alternating current to distribute itself in a conductor such that the current density is greater near the surface than near the core. The effect increases with frequency.

(Britain) A secondary, often unintended effect; a repercussion, chain reaction.

The technical notion of sensitive dependence on initial conditions in chaos theory.