According to the Online Etymology Dictionary, the word bible is from Latin biblia, traced from the same word through Medieval Latin and Late Latin, as used in the phrase biblia sacra ("holy book" - "In the Latin of the Middle Ages, the neuter plural for Biblia (gen. bibliorum) gradually came to be regarded as a feminine singular noun (biblia, gen. bibliae, in which singular form the word has passed into the languages of the Western world."). This stemmed from the Greek term τὰ βιβλία τὰ ἅγια (ta biblia ta hagia), "the holy books", which derived from βιβλίον (biblion), "paper" or "scroll," the ordinary word for "book", which was originally a diminutive of βύβλος (byblos, "Egyptian papyrus"), possibly so called from the name of the Phoenician port Byblos from whence Egyptian papyrus was exported to Greece.
Biblical scholar Mark Hamilton states that the Greek phrase Ta biblia ("the books") was "an expression Hellenistic Jews used to describe their sacred books several centuries before the time of Jesus," and would have referred to the Septuagint. The Online Etymology Dictionary states, "The Christian scripture was referred to in Greek as Ta Biblia as early as c.223."
im guessing you wanted the etymology?