There are multiple definitions:

1. human leukocyte / lymphocyte antigen(English)

   • histocompatibility locus Ag
   • ECM, FBS, GFP, HCMV, HLA-A, HLA-DQ, HLA-DR, HLA-G, IMDM, LV, mHag, MOI, PFU, PRE, Spi9, VEC, VIC
   • Hematology, Immunology, Endothelium
   • https://doi.org…bts.2024.07.003

2. horizontal long axis(English)

   • VLA, SA
   • Medical imaging
   • https://doi.org…350-022-03051-z

3. high linole acid(English)

   • as feedstuff
   • FA, MR, LLA
   • Diet, Veterinary medicine, Epigenetics
   • https://doi.org…/jds.2015-10472