exo-


Pronunciation key

( ek′sō )
( ek′sə )

ex•o-

prefix.

[< Gr. exō outside of; without; combining form Out. ECTO- < ex out of].

  1. A prefix denoting an exterior; out of, outside, outer, outer part such as in exogamy, exogenous.
  2. External such as exoskeleton, exocarp.
  3. Also, used before a vowel, ex-.

References

  • The American College Dictionary (Random House) ©1949
  • Webster's New World Dictionary of the American Language (College Edition) ©1955
  • Webster's Improved Dictionary and Everyday Encyclopedia ©1956
  • Reader's Digest Great Encyclopedic Dictionary ©1966-1967
  • Funk and Wagnalls Standard Dictionary, Comprehensive International Edition ©1976
  • Funk and Wagnalls Standard College Dictionary ©1977
  • The American Heritage Dictionary, Second College Edition ©1985

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