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alternative energy-energy derived from sources that do not use up natural resources or harm the environment. energy, free energy - (physics) a thermodynamic quantity equivalent to the capacity of a physical system to do work; the units of energy are joules or ergs; energy can take a wide variety of forms.
Definition of energy derivative: A derivative whose underlying asset is some type of energy product, such as oil or natural gas. Energy derivatives may... Definition of energy derivative: A derivative whose underlying asset is some type of energy product, such as oil or natural gas. Energy derivatives may be options, futures, or swap agreements. They are used by speculators and by companies that desire a hedge against fluctuations in energy prices.