There are multiple definitions:

1. source-to-image distance(English)

   • Medical imaging

2. [plasma] strong ion difference(English)

   • explains why a rise in plasma chloride increases the dissociation of water, resulting in more free hydrogen ions, as measured by a fall in pH
   • pH
   • Clinical chemistry
   • https://doi.org…03707-5.50065-6

3. [suspected] sacroiliac dysfunction(English)

   • clinical scores for muscle pain response by manual palpation
   • MNT, SI
   • Veterinary medicine, Pain, Scoring systems/scales
   • https://doi.org…42516406x154804

4. stimulation-induced dysarthria(English)

   • DBS, VTA
   • Neurology, Speaking / language disorders
   • https://doi.org….1002/ana.25958

5. standardized ileal digestibility(English)

   • ATTD, CP, SBM, SPC, STTD
   • Nutrition, Veterinary medicine
   • https://doi.org…7/jas.2016-0505