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energy US English

The strength and vitality required for sustained physical or mental activity

energy US Thesaurus

a good night's sleep will restore their energy

dark energy US English

A theoretical repulsive force that counteracts gravity and causes the universe to expand at an accelerating rate

energy band US English

A set of permissible energy levels (for an electron in a solid) forming a continuous range or containing no significant energy gaps.

energy bar US English

A pre-packaged food, similar in size and shape to a chocolate bar, which has a high calorie content and is considered a convenient source of energy.

free energy US English

A thermodynamic quantity equivalent to the capacity of a system to do work

life energy US English

Vital energy; = life force.

mass energy US English

Mass and energy regarded as interconvertible manifestations of the same phenomenon, according to the laws of relativity

rest energy US English

The energy equivalent of the rest mass of an object, equal to the rest mass multiplied by the square of the speed of light.

wind energy US English

Electrical energy obtained from harnessing the wind with windmills or wind turbines

atomic energy US English

Another term for nuclear energy.

energy audit US English

An assessment of the energy needs and efficiency of a building or buildings

energy drink US English

Any of various types of beverage that are considered a source of energy, especially a soft drink containing a high percentage of sugar and/or caffeine or other stimulant

energy level US English

The fixed amount of energy that a system described by quantum mechanics, such as a molecule, atom, electron, or nucleus, can have

energy-saving US English

Designed to make economical use of electricity, gas, or other forms of energy

green energy US English

Renewable energy; energy produced or harnessed in an environmentally responsible manner.

muzzle energy US English

The energy with which a projectile leaves the muzzle of a firearm.

Planck energy US English

The energy associated with a particle having the Planck mass, of the order of 1029 eV.

radial energy US English

A hypothetical form of energy postulated to produce increasing organization and complexity in both the physical and spiritual worlds, and to be manifest, for example, in the evolution of living organisms and in the development of ideas.

radio energy US English

Energy transmitted in the form of radio waves.

recoil energy US English

The energy resulting from the recoil of a discharged firearm.

solar energy US English

Radiant energy emitted by the sun

strain energy US English

Energy stored in an elastic body under loading

binding energy US English

The energy that holds a nucleus together, equal to the mass defect of the nucleus

internal energy US English

The energy in a system arising from the relative positions and interactions of its parts

kinetic energy US English

Energy that a body possesses by virtue of being in motion

lattice energy US English

A measure of the energy contained in the crystal lattice of a compound, equal to the energy that would be released if the component ions were brought together from infinity

negative energy US English

Physics. Energy in a (notional or hypothetical) form that is negative in quantity or magnitude; (in recent use also) specifically such energy associated with exotic matter.

nervous energy US English

Excess energy in a person resulting from anxiety or anticipation

nuclear energy US English

The energy released during nuclear fission or fusion, especially when used to generate electricity

radiant energy US English

Energy in the form of radiation, especially electromagnetic radiation.

surface energy US English

The excess energy per unit area associated with the surface of a liquid or solid as compared with the bulk material.

activation energy US English

The minimum quantity of energy that the reacting species must possess in order to undergo a specified reaction

alternative energy US English

Energy generated in ways that do not deplete natural resources or harm the environment, especially by avoiding the use of fossil fuels and nuclear power

ionization energy US English

Energy associated with ionization; specifically = ionization potential.

potential energy US English

The energy possessed by a body by virtue of its position relative to others, stresses within itself, electric charge, and other factors

renewable energy US English

Energy from a source that is not depleted when used, such as wind or solar power

resonance energy US English

A value of the energy of a system at which the system undergoes resonance.

sustainable energy US English

Energy derived from natural resources that are capable of being replenished, such as water, wind, or solar power, and hence can be sustained in the long term; frequently (and in earliest use) attributive.

Gibbs free energy US English

A thermodynamic quantity equal to the enthalpy (of a system or process) minus the product of the entropy and the absolute temperature

conservation of energy US English

A principle stating that energy cannot be created or destroyed, but can be altered from one form to another

energy efficiency ratio US English

The ratio of a heating or cooling system’s output, per hour, in British thermal units to the input in watts, used to measure the system’s efficiency

International Energy Agency US English

An agency founded in 1974, within the framework of the OECD, to coordinate energy supply and demand worldwide. Its headquarters are in Paris

European Atomic Energy Community US English

An institution established in 1957 to aid the exploitation of nuclear discoveries in Europe

International Atomic Energy Agency US English

An international organization set up in 1957 to promote research into and the development of atomic energy for peaceful purposes

bioenergy US English

Renewable energy produced by living organisms

G in Gibbs free energy US English

A thermodynamic quantity equal to the enthalpy (of a system or process) minus the product of the entropy and the absolute temperature

equipartition US English

The equal distribution of the kinetic energy of a system among its various degrees of freedom

equipartition of energy in equipartition US English

The equal distribution of the kinetic energy of a system among its various degrees of freedom