The meaning of INNOMINATE VEIN is brachiocephalic vein.
Merriam-Webster unabridged Popular in Grammar & Usage See More How to Use Em Dashes (—), En Dashes (–) , and Hyphens (-) Words in Disguise: Do these seem familiar? The Difference Between 'i.e.' and 'e.g.' Democracy or Republic: What's the difference?