Septuagint means in the bible: It is called the Greek translation of Old Testament because it was created in seven days by 72 elders from Jerusalem. This first attempt at translating the Old Testament into Greek was for Greek-speaking Jews in Alexandria during the reign of Ptolemy Philadelphus, 284-246 B.C. However, parts of it were not completed until the second century B.C. This version contains most of the New Testament’s Old Testament quotations. It was the Bible that was in widespread use in the Christian age and also included books known as the Apocrypha. The translation was a great help to the Christian Church. It taught in the language of civilized the religious truths which had once been the exclusive possession of the Hebrew people. This allowed a Jewish-born church to spread religion throughout the globe. The Septuagint, often called the LXX in commentary material, is frequently referred to.
(in Bible Dictionary)