51Թ

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exo-

  1. a combining form meaning “outside,” “outer,” “external,” used in the formation of compound words:

    exocentric.



exo-

1

combining_form

  1. external, outside, or beyond

    exobiology

    exothermal

“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

exo

2

/ ˈɛəʊ /

adjective

  1. an informal word for excellent
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

  1. A prefix that means “outside” or “external,” as in exoskeleton.
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51Թ History and Origins

Origin of exo-1

< Greek, combining form of éō outside
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51Թ History and Origins

Origin of exo-1

from Greek ō outside

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