1. (abbreviation) .  Second language (a language being learned, as opposed to mother tongue).
  2. (initialism) .  (space science) second Lagrange point, located further out from the primary of a system where a smaller object orbits a larger one, behind the smaller object, inline with a line drawn through the centres of the larger and smaller objects.

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This entry was last updated on RefTopia from its source on 3/20/2012.