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See also: Dex and dex-


Etymology 1[edit]

Contraction of "decimal exponent".


dex (plural dexes)

Each object pictured here is roughly one dex longer (or wider) than the one preceding it.
  1. (physics and astrophysics) An order or factor of ten. Used both to refer to the function dex(x) = 10^x and the number of (possibly fractional) orders of magnitude separating two numbers. When dealing with log to the base 10 transform of a number set the transform of 10, 100, and 1 000 000 is \log_{10}(10) = 1, \log_{10}(100) = 2, and \log_{10}(1 000 000) = 6, so the difference between 10 and 100 in base 10 is 1 dex and the difference between 1 and 1 000 000 is 6 dex.
    • 2004, Cartledge et al 2004, The Homogeneity of Interstellar Oxygen in the Galactic Disk, Abstract, The Astrophysical Journal, Volume 613, Issue 2, pp. 1037-1048,
      The data points for low-<nH> paths are scattered more widely than those for denser sight lines, because O/H ratios for such paths shorter than 800 pc are generally about 0.10 dex lower than the values for longer ones.
See also[edit]

Etymology 2[edit]

By shortening.


dex (uncountable)

  1. (informal) dextromethorphan





  1. An expression used by some locals in Bergen (Norway) to emphasize that something is good, nice.




  1. river