To make fivefold; increase or repeat to the number of five.
Consisting of or relating to a set of five, or to five corresponding parts.
n. One of five things corresponding in every respect to one another.
Word Usage
"The first time was for a repetitive stress injury to the soft tissue of my hand (my fingers and hand swelled) due to writing so much in quintuplicate for the movie industry (with one period that consisted of about 30 hours straight)."