Answer: The word that means "a quotation at the beginning of a novel” is "epigraph".
Explanation: The word "epigraph" is a noun and it makes reference to <u>a quotation</u>, that is to say a phrase or sentence previously written or pronounced by another author, <u>which is placed at the beginning of a piece of writing</u>, such as a novel or a short story. The prefix contained in "epigraph", "epi-", also signals this meaning as <u>"epi-" means "above" or "on top of"</u>.