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exobiology
exocarp
exocrine
exocrine gland
exocyclic
exocytosis
Exod.
exodontics
Exodus
exodus
exoenzyme
exoergic
exogamy
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exordium

ex·or·di·um [ eg záwrdee əm ] (plural ex·or·di·ums or ex·or·di·a [ eg záwrdee ə ])


noun 
Definition:
 
first part: an opening section, especially of a lecture or a piece of scholarly writing ( formal )

[Late 16th century. < Latin< exordiri "begin"]

ex·or·di·al adjective
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