quinque-

1.
a combining form meaning “five,” used in the formation of compound words:
quinquevalent.
Origin
< Latin, combining form of quīnque; see five
British Dictionary definitions for quinque-

quinque-

combining form
1.
five: quinquevalent
Word Origin
from Latin quinque
Word Origin and History for quinque-

before vowels quinqu-, word-forming element meaning "five, having five," from Latin quinque "five," by assimilation from PIE *penkwe (see five).