What is Quod Nullum Est?

Legal Definition
Qnod !n jure scripto "jus" appcllatur, id ill lege Anglise "rectum" esse dicitur. What in the civil law is called "jus," in the law of England is said to be "rcctum," (right) Co. Litt. 200; Fleta, 1. 0, c. 1,