Noun. 1. vas deferens-a duct that carries spermatozoa from the epididymis to the ejaculatory duct. ductus deferens.
Judge Advocate General of the Navy. The Judge Advocate General of the Navy (JAG) is the highest-ranking uniformed lawyer in the United States Department of the Navy. The Judge Advocate General is the principal advisor to the Secretary of the Navy and the Chief of Naval Operations on legal matters pertaining to the Navy.
A judge advocate general (JAG) has headed the Canadian military legal branch since before the First World War. The branch interprets the Canadian Forces' own internal rules and code of discipline, and also international and humanitarian laws and codes of war, such as the Geneva Conventions.