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포디아이피(주)에서 알려드리는 소식입니다.


Writer Admin(admin) Time 2020-02-21 07:54:42
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Numerical Prefixes

The Greek numerical prefixes are used for naming things like polygons, polyhedra and polynomials::

  • mono = 1
  • di = 2
  • tri = 3
  • tetra = 4
  • penta = 5
  • hexa = 6
  • hepta = 7
  • octa = 8
  • ennea = 9
  • deca = 10
  • hendeca = 11
  • dodeca = 12
  • triskaideca = 13
  • tetrakaideca...enneakaideca = 14...19
  • icosa = 20
  • icosikaihena = 21
  • icosidi...icosiennea = 22...29
  • triaconta = 30
  • tetraconta...enneaconta = 40..90
  • hecto | hecato = 100
  • chilia = 1000
  • myria = 10000

     

The word "kai", meaning and, is often omitted. Chemistry uses a slightly different set of prefixes, two of which come from latin::

  • nona = 9
  • undeca = 11

     

And the rest of which are pretty much made up::

  • henicosa = 21
  • docosa...nonacosa = 22...29
  • hentriaconta...nonatriaconta = 31...39
  • kilia = 1000
  • dilia...nonalia = 2000...9000

     

And, finally, for large numbers these prefixes are used:

  • bi = 2
  • tri = 3
  • quadra = 4
  • quinta = 5
  • sexta = 6
  • septa = 7
  • octo = 8
  • nona = 9
  • deca = 10
  • undeca = 11
  • dodeca = 12
  • tredeca = 13
  • quattuordeca = 14
  • quinquedeca = 15
  • sexdeca = 16
  • septendeca = 17
  • octodeca = 18
  • novemdeca = 19
  • viginti = 20
  • unviginti...novemviginti = 21...29
  • triginti = 30

     

Some of these suffices need checking, since these are not quite the latin names of the numbers...but in the actual compounds (e.g. octillion, vigintillion) they disappear.