from The American Heritage® Dictionary of the English Language, 4th Edition
- All: panorama.
- Involving all of or the union of a specified group: Pan-Hellenic.
- General; whole: panleukopenia.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- A combining form meaning "all", used in the formation of compound words.
from the GNU version of the Collaborative International Dictionary of English
- Combining forms signifying all, every. Pan- becomes pam- before b or p, as pamprodactylous.
Greek, from pan, neuter of pās, pant-, all; see pant- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Ancient Greek πᾶν (pan), neuter form of πᾶς (pas, "all, every") (Wiktionary)
Most combinations with pan- are proper nouns, however, and both pan- and the proper name it is combined with are capitalized:
His policy of using Libya’s oil wealth to aggressively pursue his pan- Africanist vision has paid rich dividends.