There are multiple definitions:

1. 2,5-diphenyloxazole(English)

   • Abbreviation may be used in Am. Soc. Physiol. journals without definition.
   • POPOP
   • Histochemistry, Physiology
   • https://doi.org…1007/BF00493256

2. preferred provider organization(English)

   • HMO
   • Care giver/provider

3. Perception of Partner’s Opinion(English)

   • BACD, BACDSA, FBP, GBD, SISP, SS
   • Sexuality, Psychology
   • https://doi.org…09.2012.02893.x

4. periprosthetic osteolysis(English)

   • as induced by wear particles is the most severe complication of total joint replacement
   • MLO-Y4, MC3T3-E1, Cx43, PIO, RANKL, TF3
   • Prosthetics, Skeleton and bone (formation)
   • https://doi.org…0/ijms241310864