#equilibrium  a stable situation in which forces cancel one another
  exclusion:  disequilibrium
  supertype:  state_of_affairs__situation  the general state of things; the combination of circumstances at a given time; "the present international situation is dangerous"; "wondered how such a state of affairs had come about"; "eternal truths will be neither true nor eternal unless they have fresh meaning for every new social situation"- Franklin D.Roosevelt
  subtype:  balance  a state of equilibrium
     subtype:  tension.balance  a balance between and interplay of opposing elements or tendencies (especially in art or literature); "there is a tension created between narrative time and movie time"; "there is a tension between these approaches to understanding history"
     subtype:  electrolyte_balance__electrolytebalance  an equilibrium between the amounts of electrolytes (as calcium and sodium and potassium) that is essential for normal health and functioning
     subtype:  nitrogen_balance  the balance between the amount of nitrogen taken in (to the soil or the body) and the amount given off (lost or excreted)
  subtype:  balance_of_power  an equilibrium of power between nations
  subtype:  dynamic_balance__dynamicbalance  (aeronautics) the state of equilibrium in which centrifugal forces due to a rotating mass (e.g., a propeller) do not produce force in the shaft and so vibration is reduced
  subtype:  homeostasis__homeostasi  metabolic equilibrium actively maintained by several complex biological mechanisms that operate via the autonomic nervous system to offset disrupting changes
  subtype:  poise.equilibrium  a state of being balanced in a stable equilibrium
  subtype:  thermal_equilibrium__thermalequilibrium  a state in which all parts of a system are at the same temperature

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