A reaction engine that obtains thrust by jet propulsion which forms its jet exclusively from propellant.

Used traditionally at the end of a story or film. / Used to indicate the termination of something. / The end of the world, particularly in a religious sense.

A small table placed beside a chair or at each end of a sofa.

(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

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

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).

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

(physics) The difference between the actual energy of a particular energy level of an atom or molecule and that calculated by the Hartree-Fock approximation