Apocrypha are works, usually written, of unknown authorship or of doubtful origin. Biblical apocrypha is a set of texts included in the Latin Vulgate and Septuagint but not in the Hebrew Bible. While Catholic tradition considers the texts to be deuterocanonical, Protestants consider them apocryphal. Thus, Protestant bibles do not include the books within the Old Testament but have often included them in a separate section. Other non-canonical apocryphal texts are generally called pseudepigrapha, a term that means "false writings".
The word's origin is the Medieval Latin adjective apocryphus, "secret, or non-canonical", from the Greek adjective ἀπόκρυφος (apokryphos), "obscure", from the verb ἀποκρύπτειν (apokryptein), "to hide away"....LESS