Merriam-Webster's Collegiate® Dictionary, 11th Edition
VET
I. noun
Date: 1862
veterinarian , veterinary ,
II. transitive verb (vetted; vetting)
Date: 1891
1. to provide veterinary care for (an animal) or medical care for (a person), to subject (a person or animal) to a physical examination or checkup,
2. to subject to usually expert appraisal or correction , to evaluate for possible approval or acceptance , vetter noun
III. adjective or noun
Date: 1848
veteran