(physics) a wave, propagated through a crystal lattice as a result of changes in the spin angular momentum of electrons in the lattice

(neurology) An electrical signal produced by the brain while the subject is relaxed.

(physics) The longitudinal wave of pressure that is transmitted through any plastic material; audible sound.

(physics) a collection of waves, travelling together / (physics) a probability wave

(physics) The component of an electromagnetic wave (especially a radio wave) that travels directly from transmitter to receiver without being reflected

(oceanography, meteorology) A non-dispersive wave in the ocean or atmosphere that balances the Earth's Coriolis force against a topographic boundary such as a coastline, or a waveguide such as the equator.

(idiomatic) A simple gesture, as used for command, dismissal, or summoning something as if by magic.

(physics) A constant-frequency wave whose wavefronts are infinite parallel planes of constant peak-to-peak amplitude normal to the phase velocity vector.

(Singapore) Synonym of Mexican wave

A pattern of neural oscillation in humans, with a frequency between 25 and 100 Hz.