Actio quod metns cansa
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
An action granted to one who had been compelled by unlawful force, or fear (metUs causa) that was not groundless, (metus probabilis or justus,) to deliver, sell, or promise a thing to another. Bract, fol.
103b; Mackeld. Rom. Law, § 226.