There are multiple definitions:

1. enlargement of vestibular aqueduct(English)

2. enhancer of ventral axon(English)

3. earth-vertical axis [rotation](English)

   • refers to rotational maximum sensitivity vectors
   • EHA, VN, SCC
   • Audiology, Physiology
   • https://doi.org…2/jn.00518.2002

4. extracranial vertebral artery(English)

   • BA, CTA, DCI, IVA, FV, MFV, SAH, TCD, VA
   • Anatomy, Brain (dys)function, Vessel properties
   • https://doi.org…/jnn.2022.00115

5. electric vacuum aspiration(English)

   • with less than 50 days of gestational age, less blood loss and less severe pain perception were reported during the MVA procedure, whereas the operation time was shorter in the EVA procedure
   • D&C, IUA, MVA, GA
   • Obstetrics
   • https://doi.org…28.2007.01572.x