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I have searched the internet for how to form the following words, but have been unable to find an authoritative source. They are obviously formed with latinate prefixes, but if you look at the lists here, the sandhi/morphotactics are not straightforward.

With regard to words describing equally divided parts of a plane, how are the following words formed, and do I even have them right?

4 - quadrant
5 - quintant
6 - sextant
7 - septant                               ???
8 - octant
9 - nonant
10 - decant/decimant                      ???
16 - sedecimant                           ???
64 - sexagesim quadrant                   ???
100 - centant/centasimant                 ???
400 - quadringentant/quadringentesimant   ???

closed as off-topic by marcellothearcane, NVZ, Edwin Ashworth, Mitch, David Aug 25 '17 at 12:59

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  • Please include the research you’ve done, or consider if your question suits our English Language Learners site better. Questions that can be answered using commonly-available references are off-topic. – marcellothearcane Aug 24 '17 at 18:10
  • 3
    Hugely related: Words beyond quadrant – Andrew Leach Aug 24 '17 at 18:16
  • 2
    Maybe you'll find better answers in Mathematics Stack Exchange, under the tag terminology – NVZ Aug 24 '17 at 18:19
  • @marcellothearcane If you can direct me to commonly-available references on the topic, I would be grateful. – reynoldsnlp Aug 24 '17 at 18:22
  • @AndrewLeach Perhaps "quadrant" is it. ;-) – reynoldsnlp Aug 24 '17 at 18:23

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