There are multiple definitions:

1. necrotic volume increase(English)

   • RVD, RVI, ADV
   • Physiology, Apoptosis
   • https://doi.org…93.2001.0003g.x

2. non-verbal individual(English)

   • refers to pain assessment in neurodegenerative diseases
   • NVI, QOL
   • Gerontology/Geriatrics, Pain
   • https://doi.org…55/2016/2949358