#balance  a state of equilibrium
  exclusion:  imbalance
  supertype:  equilibrium  a stable situation in which forces cancel one another
  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)

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