laesio ultra dimidium vel enormis

/liyz(h)(i)yow altra damidiysm vel snormas/

In Roman law, the injury sustained by one of the parties to an onerous contract when he had been overreached by the other to the extent of more than one-half of the value of the subjectmatter; e.g., when a vendor had not received half the value of property sold, or the purchaser had paid more than double value