There are multiple definitions:

1. short-term fluctuation(English)

   • CLV, CPSD, PSD

2. short-term facilitation(English)

3. selective thoracic fusion(English)

   • AIS, LL, PI, PT, SS, L-AIS, NSTF, T-AIS, TK
   • Spine (or spinal cord), Skeleton and bone (formation)
   • https://doi.org…018.2.PEDS17687

4. subtrochanteric fracture(English)

   • FEA, LISS, PFLP, PFNA
   • Skeleton and bone (formation), Injury
   • https://doi.org…tsr.2019.04.027