Septuagint

n. oldest known Greek translation of the Old Testament (dated to the 3rd century BC, and supposedly translated by 72 Hebrew scholars)

The Septuagint , or simply "LXX", is the name commonly given in the West to the Koine Greek version of the Old Testament, translated in stages between the 3rd and 1st centuries BCE in Alexandria. It is the oldest of several ancient translations of the Hebrew Bible into Greek. The word "septuaginta" means "seventy" in Latin and derives from a tradition that seventy-two Jewish scholars (seventy being the nearest round number) translated the Pentateuch (or Torah) from Hebrew into Greek for one of the Ptolemaic kings, Ptolemy II Philadelphus, 285–246 BCE.
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Noun
1. the oldest Greek version of the Old Testament; said to have been translated from the Hebrew by Jewish scholars at the request of Ptolemy II
(hypernym) Old Testament

(n.)
A Greek version of the Old Testament; -- so called because it was believed to be the work of seventy (or rather of seventy-two) translators.
  

Septuagint Greek version of Old Testament. {SD 1:576, 2:200n; BCW 14:178-9, 182n, 324-5}