Exo- Definition
eksō, eksə
prefix
Outside; external.
Exoskeleton.
American Heritage
affix
Outside, outer, outer part.
Exogamy.
Webster's New World
Origin of Exo-
-
From Greek exō outside from ex out of eghs in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition
From Ancient Greek ἔξω (exō, “outer, external”).
From Wiktionary
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