There are multiple definitions:

1. tartrate-resistant acid phosphatase(English)

   • a glycosylated monomeric metalloprotein enzyme expressed in mammals; identical to ACP5
   • ACP5, OPN
   • Autoimmunity, Musculoskeletal system
   • https://doi.org…916930701694667

2. twin reversed arterial perfusion(English)

   • one of the two fetuses either has a very underdeveloped heart or no heart at all; new name for AT
   • AT
   • Pregnancy, Embryology /reproduction
   • https://www.mot…fusion-sequence

3. telomeric repeat amplification protocol(English)

   • CDKI, DMEM

4. tumor necrosis factor-related activation protein(English)

   • aka CD40 ligand, CD154

5. translocon-associated protein(English)

6. thrombin-receptor activating peptide(English)

   • SFLLRN
   • Thrombocyte /thrombosis