Exodermal Regeneration Cycle [ERC]: the twenty-six million year process wherein the earth molecule grows, sheds, reincorporates, and renews it 'living' integumentary system (lithosphere, hydrosphere, atmosphere, biosphere).
"The earth is a self-organizing, self-regulating system maintained far from thermodynamic equilibrium under energy flow – in these respects, it is indeed like an organism."
– Thermodynamic Researcher: Mae-Wan Ho 
Efficiency: the ratio of the useful energy delivered by a dynamic system to the energy supplied to it. Generally speaking, efficiency is the ratio of work energy output divided by heat energy input. Technically, a thermal engine, which may be mechanical or not, which takes a heat quantity (QH > 0) from a hot source for returning (QC < 0) to a cold sink and converting difference into useful work (W < 0) has an efficiency defined by [2,3]:
η = -W/QH < 1
The first to define efficiency was the French Engineer Sadi Carnot, who in 1824 noted that it was only the difference in temperature between the hot source and the cold sink that determined efficiency. He defined efficiency, for a Carnot engine (a hypothetical 'perfect' reversible engine, i.e. one with no friction / heat loss) as:
ηrev = 1 - TC/TH
For either a reversible (hypothetical) or irreversible (real) engine, as a multi-bonded dihumanide molecular engine or work-yielding human chemical reaction, thermal efficiency is given by the following equation :
η = 1 - QC/QH
For example, the Sony Corporation, a bonded structure of 162,000 human molecules, can be defined as a supra-human-molecular engine, characterized by a definite thermodynamic efficiency. Loosely speaking, human molecules external to the company, as a system, are generally 'hot' [QH] for Sony products; this accrues to the effect of purchase or energetic exchange of product for revenue, which itself defines bond formation.
However, there are those human molecules internal to the company, owing to product accessibility, over saturation, etc., that will typically be 'cold' [QC] for Sony product (or sick of it we may say from being around it so much). Thus, heat or energy in transit flows from the hot source into the cold sink and through the corporation where resultantly work [Wnet, out] or product is produced as output. Hence, here we can define a specific supra-human molecular organism (engine) efficiency. Below this level of discernment, as can be shown, any type of efficiency correlates to specific unit-by-unit bond arraignments. Meaning, in a corporation, for example, if each unit (bonded human molecule) is optimized for productivity, i.e. fit to his or her most 'desired' position, then overall contentment and hence maximal obtainable efficiency results.
Earth Molecule: the definition of the earth when viewed as one 'big' biogeochemical molecule [an aggregate of at least two atoms]; definitively, the bonded interrelation of protons, neutrons, electrons, and field particles that comprise its structural integrity, being chemically-defined according to the following (approximate) ninety-two element molecular formula and commonly-known rotating spherical structure (globe):