extra-

extra-

a prefix meaning “outside,” “beyond,” freely used as an English formative: extrajudicial; extraterritorial; extra-atmospheric.
Also, extro-.


Origin:
< Latin, combining form of extrā (adv. and preposition) outside (of), without

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Collins
World English Dictionary
extra-
 
prefix
outside or beyond an area or scope: extrasensory; extraterritorial
 
[from Latin extrā outside, beyond, changed from extera, from exterus outward]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

extra- or extro-
pref.
Outside; beyond: extracellular.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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