from The American Heritage® Dictionary of the English Language, 4th Edition
- Five: quinquevalent.
from Wiktionary, Creative Commons Attribution/Share-Alike License
from the GNU version of the Collaborative International Dictionary of English
- A combining form meaning five, five times, fivefold
Latin quīnque-, from quīnque, five; see penkwe in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin quinque ("five"). (Wiktionary)