(chemistry) the mesomeric effect

(chemistry) A compound for which no simple structure can be written, but which actually has a structure midway between two simple ones - normally one polar and one nonpolar.

A chamber whose dimensions allow sound to echo and build up. / A similar chamber that allows resonance of electromagnetic waves.

(physics) The characteristic energy at which the amplitude of a system undergoing resonance is enhanced.

A form of waveguide, closed at each end, used to create an intense electromagnetic wave

plural of Helmholtz resonator

plural of Schumann resonance

Any of a set of spectrum peaks in the extremely low-frequency (ELF) portion of the Earth's electromagnetic field spectrum, generated and excited by lightning discharges in the cavity formed by the Earth's surface and the ionosphere.

plural of cavity resonator

plural of resonating chamber