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.
(jÄ'pÄg') 1  Short for Joint Photographic Experts Group. 2  A standard algorithm for the compression of digital images, making it easier to store and transmit them. 3  A digital image that has been compressed using this algorithm.