What is Calumnia?

Legal Definition
In the civil law. Calumny, malice or ill design; a false accusation; a malicious prosecution. Lanning v. Christy, 30 Ohio St 115, 27 Am. Rep. 481. In the old common law. A claim, demand, challenge to jurors.
-- Black's Law Dictionary
Legal Definition
A false charge; a calumny; a claim; a demand.
-- Ballentine's Law Dictionary