(mathematical analysis, functional analysis, Fourier analysis) A quadratic functional which, given a real function defined on an open subset of ℝⁿ, yields a real number that is a measure of how variable said function is.

plural of energy vampire

A designated area for the generation of clean energy such as wind and solar power.

plural of energy park

(energy efficiency) The energy that is lost due to standby electronic activity of equipment that is "off", on standby or sleep mode.

(cosmology, astrophysics, astronomy, physics) A category of dark energy, where dark energy is not fixed in amount nor in density, and continuously increases over time.

plural of energy medicine

(physics) Energy of the wind. / Such energy harnessed as a power source, especially as applied to a category of electrical generation.

(US) Alternative spelling of alternative energy

Alternative form of bioenergy