energyd
Energyd is a term used in fictional and theoretical contexts to denote a measure of energy content relative to mass. It is not an official SI unit and is not widely adopted in mainstream physics.
In its common usage, energyd refers to specific energy, a quantity describing how much usable energy a
Applications of energyd appear in thought experiments to compare storage media, fuels, or propulsion concepts. In
Limitations of energyd arise from its lack of standardization and context-dependence; values vary by author, framework,
See also energy density, specific energy, joule per kilogram, thermodynamics.