There are multiple definitions:

1. veno-venous(English)

   • ECMO can be implemented either as veno-arterial (VA) or veno-venous (VV) therapy
   • ECMO, VA
   • Pulmonology
   • https://doi.org…1471-2253-14-65

2. varicose vein(English)

   • CVI
   • Vascular disease
   • https://doi.org…-2930-6.00054-9

3. vasa vasorum(Latin)

   • defined literally as vessels of the vessels, and predominantly observed in large vessels with an important role under pathological conditions
   • Anatomy, Vessel properties
   • https://doi.org…03058-5.00006-0

4. voided volume(English)

   • ICIQ-SF, KHQ, UUI
   • Urology
   • https://doi.org…0X.2008.07907.x

5. vaccinia virus(English)

   • a pertinent boost regime with recombinants expressing relevant antigens have been shown to elicit protection against a variety of pathogens in animal model systems
   • IL-18, p36, LACK, VVr, IL-12
   • Virology, Microbiology, Vaccination
   • https://doi.org…4579(02)00077-1