There are multiple definitions:

1. peptide mass fingerprinting(English)

   • common strategy to identify proteins and protein expression pattern in biological samples
   • Genomics
   • https://doi.org…59745-227-0:219

2. progressive massive fibrosis(English)

   • Pathology

3. probability mass function(English)

   • also as pmf
   • pmf
   • Statistics
   • https://doi.org…ROC.2005.859599

4. pterygomaxillary fissure(English)

   • HRCT, IOF, ION, ITF, MRI
   • Medical imaging, ENT
   • https://doi.org…3244-016-0498-1