• Endo-exo isomerism
  Endo-exo isomerism
  Endo-exo isomerism is a special type of isomerism found in organic compounds with a substituent on a bridged ring system. The prefix endo is reserved for the isomer with the substituent located closest, or "syn," to the longest bridge. The prefix exo is reserved for the isomer with the substituent...
  
  
• The Enriched Xenon Observatory
  Enriched Xenon Observatory
  The Enriched Xenon Observatory is a particle physics experiment searching for double beta decay of xenon-136. The experiment uses a large amount of xenon, isotopically enriched in xenon-136...
  
   neutrinoless double beta decay experiment
• eXo Platform
  EXo Platform
  eXo Platform is an open source, open standard, Enterprise-scale portal, content management system and WebOS for Microsoft Windows and Unix-like operating systems. The eXo Platform project started in 2003 as an implementation of the first portlet API . eXo Platform is developed using Java technology...
  
   the open source software (Portal, Enterprise Content Management, WebOS, Collaborative Suite, ...)
• exo-, a prefix
  Prefix
  A prefix is an affix which is placed before the root of a word. Particularly in the study of languages,a prefix is also called a preformative, because it alters the form of the words to which it is affixed.Examples of prefixes:...
  
   derived from Ancient Greek ἔξω, meaning outside or external. Commonly used in biology.

See also

• Endo (disambiguation), a prefix, an antonym (opposite meaning) for the prefix 'exo-'