Meaning of deuterocanonical books

deu'ter•o•ca•non'ical books'

Pronunciation: (d'tu-rō-ku-non'i-kul, dy'-, d"-, dy"-), [key]
  1. the books of the Bible regarded by the Roman Catholic Church as canonical but not universally acknowledged as such in the early church, including, in the Old Testament, most of the Protestant Apocrypha.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.