ADJECTIVE (2)

1. of, relating to, or used in public debate or argument;

2. used or applied in the investigation and establishment of facts or evidence in a court of law;
- Example: "forensic photograph"
- Example: "forensic ballistics"

The Collaborative International Dictionary of English v.0.48:

Forensic \Fo*ren"sic\, a. [L. forensis, fr. forum a public
   place, market place. See Forum.]
   Belonging to courts of judicature or to public discussion and
   debate; used in legal proceedings, or in public discussions;
   argumentative; rhetorical; as, forensic eloquence or
   disputes.
   [1913 Webster]

   Forensic medicine, medical jurisprudence; medicine in its
      relations to law.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Forensic \Fo*ren"sic\, n. (Amer. Colleges)
   An exercise in debate; a forensic contest; an argumentative
   thesis.
   [1913 Webster]