There are multiple definitions:

1. very long-chain(English)

   • refers to polyunsaturated fatty acids
   • ALA, DHA, EPA, SDA
   • Nutrition, Veterinary medicine
   • https://doi.org….1021/jf505185u

2. visible light communication(English)

   • MC
   • Communication, Photonics
   • https://doi.org…OC.2021.3061778