Sev·en·ty, n.; pl. Seventies
  1. The sum of seven times ten; seventy units or objects.
  2. A symbol representing seventy units, as 70, or lxx.
  The Seventy, the translators of the Greek version of the Old Testament called the Septuagint. See Septuagint.
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  seventies
       n 1: the decade from 1970 to 1979 [syn: 1970s]
       2: the time of life between 70 and 80 [syn: mid-seventies]