There are multiple definitions:

1. tissue proximity indicator(English)

   • refers to a filter
   • AF, CF, ME, RM
   • Electrophysiology, Filtering (of signals)
   • https://doi.org….1111/jce.13472

2. tipiracil(English)

   • FTD, RAM
   • Oncology, Therapeutic approaches
   • https://doi.org…885-023-11199-1