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• EO
  EO

  executive order.
• eo-
  eo-

  a combining form meaning “early,” “primeval,” used in the formation of compound words.
• e.o.
  e.o.

  abbreviation

  ex officio.

EO

¹ American  

1. executive order.

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eo- ² American  

1. a combining form meaning “early,” “primeval,” used in the formation of compound words.

   Eocene; eohippus.

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e.o. ³ American  

abbreviation

1. ex officio.

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e.o. ¹ British  

abbreviation

1. ex officio

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eo- ² British  

combining form

1. early or primeval

   Eocene

   eohippus

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Etymology

Origin of eo-

< Greek, combining form of ēṓs ( Attic héōs ) dawn; akin to east, Aurora