octuplicate
A set of eight like or identical things.
countable, uncountable
It was an understood thing in our squadron that no one was on any account to bring the Baron down, but some of our pilots had come close enough to see his beetling brows and purple cheeks reflected in octuplicate.
Where it comes from
Borrowed from Late Latin octuplicātus, perfect passive participle of octuplicō or formed by blend of octuple + duplicate, either way, see -ate (noun-forming suffix) and -ate (verb-forming suffix).
Adapted from the Wiktionary entry octuplicate (CC BY-SA 4.0).