1. equilibrium constant (chemistry) the ratio of concentrations when equilibrium is reached in a reversible reaction (when the rate of the forward reaction equals the rate of the reverse reaction)
  2. equilibrium a stable situation in which forces cancel one another
  3. solar constant the rate at which radiant solar energy is received at the outer layer of the earth's atmosphere
  4. rydberg constant a wave number characteristic of the wave spectrum of each element
  5. color constancy the tendency for a color to look the same under widely different viewing conditions
  6. colour constancy the tendency for a color to look the same under widely different viewing conditions
  7. Hubble's constant (cosmology) the ratio of the speed of recession of a galaxy (due to the expansion of the universe) to its distance from the observer; the Hubble constant is not actually a constant, but is regarded as measuring the expansion rate today
  8. Hubble constant (cosmology) the ratio of the speed of recession of a galaxy (due to the expansion of the universe) to its distance from the observer; the Hubble constant is not actually a constant, but is regarded as measuring the expansion rate today
  9. equilibrium law (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
  10. security consultant an adviser about alarm systems to prevent burglaries
  11. Planck's constant the constant of proportionality relating the energy of a photon to its frequency; approximately 6.626 x 10^-34 joule-second
  12. inconstant likely to change frequently often without apparent or cogent reason; variable
  13. equal opportunity the right to equivalent opportunities for employment regardless of race or color or sex or national origin
  14. time constant (electronics) the time required for the current or voltage in a circuit to rise or fall exponentially through approximately 63 per cent of its amplitude
  15. constant uninterrupted in time and indefinitely long continuing
  16. equidistant exactly as far from one point as from another
  17. cosmological constant an arbitrary constant in the equations of general relativity theory
  18. equilibration stabilization by bringing into equilibrium
  19. dissociation constant the equilibrium constant for a reversible dissociation
  20. gas constant (physics) the universal constant in the gas equation: pressure times volume = R times temperature; equal to 8.3143 joules per kelvin per mole