[1850–55; extra- + galactic]This word is first recorded in the period 1850–55. Other words that entered Englishat around the same time include: clear-cut, cloakroom, ethylene, headhunting, overprintextra- is a prefix meaning “outside,” “beyond,” freely used as an English formative. Otherwords that use the affix extra- include: extra-atmospheric, extrajudicial, extraterritorial
Examples of 'extragalactic' in a sentence
extragalactic
He's a gift to all things galactic and extragalactic.
The Sun (2011)
But the most notable work of this period was in extragalactic research.