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I'm looking for prefixes which mean that something emanates/flows/comes from inside / outside, as opposed to existing / being located inside' ('endo-'), or 'existing / being located outside' ('exo-').

Thanks.

  • 2
    The problem seems to be that the propositions that express loocaton also express motion to or from that location, so to get the sense your looking for, the prefix has to be affixed to something already (endogenous, for example). – phoog Jun 16 '15 at 16:23
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    endo-: word-forming element meaning "inside, within, internal," comb. form of Greek endon "in, within," literally "in the house of," . exo- word-forming element meaning "outer, outside, outer part" used from mid-19c. in scientific words (such as exoskeleton), from Greek exo "outside," related to ex "out of" (see ex-). endogenous, exogenous – user66974 Jun 16 '15 at 16:23
  • 'Endo-' it is then. Of for my purposes 'gen-' kind of fits the bill. – Dale Newton Jun 16 '15 at 16:41
  • Root-word GEN (genus) meaning Race & Kind of. english-for-students.com/gen.html – user66974 Jun 16 '15 at 16:47
  • @Josh61 Yes, 'gen-' is also medical prefix though, coming from Greek 'to produce', which as I say, kind of fits for my purposes. – Dale Newton Jun 16 '15 at 16:58
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extra-
prefix: extra-
outside; beyond.
"extracellular"
beyond the scope of.
"extracurricular"

intra-
prefix
(added to adjectives) on the inside; within.
"intramural"

  • I'm not sure this is complete, though, we may need a suffix with this. "Extraterrestrial" comes to mind. – Rob_vH Jun 21 '15 at 2:52
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ex- out of, from, away from.

http://www.medilexicon.com/medicaldictionary.php?t=30824

Example: excementosis

Reference for existing use in med-term:

http://medical-dictionary.thefreedictionary.com/excementosis

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