The Roman numeral symbol for Seventy; hence used as an abbreviation for SEPTUAGINT.

1

1662.  Stillingfl., Orig. Sacr., III. iv. § 9. The learned dissertation of the late learned Bishop of Chester upon the LXX.

2

1883.  Cath. Dict. (1897), 617/2. The LXX entirely misses the sense; the Vulgate has ‘loquens pro eo.’

3

  attrib.  1900.  Margoliouth, in Expositor, Jan., 33. The LXX. translator of the Song of Solomon.

4