| var. of extra- (used to contrast with intro-): extrovert. |
| a prefix meaning “outside,” “beyond,” freely used as an English formative: extrajudicial; extraterritorial; extra-atmospheric. |
| extra- or extro- pref. Outside; beyond: extraterritorial. [Latin extrā-, from extrā; see eghs in Indo-European roots.] |
| extro- pref. Variant of extra-. |
extra- or extro-
pref.
Outside; beyond: extracellular.
extro- pref.
Variant of extra-.