extra-

1.
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
British Dictionary definitions for extra-

extra-

prefix
1.
outside or beyond an area or scope: extrasensory, extraterritorial
Word Origin
from Latin extrā outside, beyond, changed from extera, from exterus outward
Word Origin and History for extra-

only recorded in classical Latin in extraordinarius, but much used in Medieval Latin and modern formations; it represents Latin extra (adv.) "on the outside, without, except," the old fem. ablative singular of exterus "outward, outside," comparative of ex "out of" (see ex-).

extra- in Medicine

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