There are multiple definitions:

1. outer plexiform layer(English)

   • ELM, GCL, HDAC4, IPL, ONL

2. oral pre-malignant lesion(English)

   • may present as leukoplakia or erythroplakia
   • CRT, HNSCC, IARC
   • Oncology, Mouth, esophagus and stomach
   • https://doi.org…572-020-00224-3
   • https://doi.org…0147-010-0157-3

3. oblique popliteal ligament(English)

   • the largest structure on the posterior aspect of the knee, and given its broad shape, it is probably vulnerable to, or easily involved in, posterior knee injuries
   • MCL, POL, sMCL
   • Musculoskeletal system, Injury
   • https://doi.org….1038/srep42698