1. law of chemical equilibrium (chemistry) the principle that (at chemical equilibrium) in a reversible reaction the ratio of the rate of the forward reaction to the rate of the reverse reaction is a constant for that reaction
  2. chemical equilibrium a chemical reaction and its reverse proceed at equal rates
  3. thermal equilibrium a state in which all parts of a system are at the same temperature
  4. punctuated equilibrium a theory of evolution holding that evolutionary change in the fossil record came in fits and starts rather than in a steady process of slow change
  5. Nash equilibrium (game theory) a stable state of a system that involves several interacting participants in which no participant can gain by a change of strategy as long as all the other participants remain unchanged
  6. equilibrium a stable situation in which forces cancel one another
  7. thermodynamics of equilibrium the aspect of thermodynamics concerned with thermal equilibrium
  8. theory of punctuated equilibrium a theory of evolution holding that evolutionary change in the fossil record came in fits and starts rather than in a steady process of slow change
  9. chemical property a property used to characterize materials in reactions that change their identity
  10. acid-base equilibrium the normal equilibrium between acids and alkalis in the body
  11. family Colubridae nonvenomous snakes; about two-thirds of all living species
  12. chemical group (chemistry) two or more atoms bound together as a single unit and forming part of a molecule
  13. disequilibrium loss of equilibrium attributable to an unstable situation in which some forces outweigh others
  14. sense of equilibrium a sensory system located in structures of the inner ear that registers the orientation of the head
  15. chemical compound (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight
  16. Archilochus colubris a kind of hummingbird
  17. biochemical mechanism a chemical mechanism involved in vital processes occurring in living organisms
  18. chemical energy that part of the energy in a substance that can be released by a chemical reaction
  19. pocket calculator a calculator small enough to hold in the hand or carry in a pocket
  20. chemical terrorism terrorism using the chemical agents of chemical warfare