(physics) The underlying background energy of empty space associated with constant vacuum fluctuations.

(physics) Energy stored in a ferromagnetic material as a result of the work done by the rotation of its magnetization

(US) Alternative spelling of alternative energy

(chemistry, physics) The sum of the bond dissociation energies of all the bonds in a molecule / (chemistry, physics) The average or typical bond dissociation energy of a particular type of bond

(physics, chemistry) The energy needed to break every chemical bond in a molecule and completely separate all its atoms

(physics) The energy associated with the electrostatic forces of a system of particles, especially with that of the electrons of a covalent bond.

Energy derived from any source other than fossil fuels. / Energy derived from any renewable source, i.e other than fossil fuels or nuclear fission.

(physics) The difference between the average energy of the free atoms and that of the atoms of a solid (especially a crystal).

The energy of a system with respect to its centre of gravity

(physics) All energy that could somehow be converted to mechanical work.