There are multiple definitions:

1. spatiotemporal QRST cancellation(English)

   • ECG
   • Electrophysiology, Cardiology

2. sternocostal [portion of pectoralis major muscle](English)

   • CL, PM, hCL
   • Anatomy
   • https://doi.org…55/2019/6212039

3. sensory trigeminal complex(English)

   • c-Fos, HRP, SO
   • Neurology
   • https://doi.org….1002/cne.10917

4. suppression tuning curve(English)

   • DPOAE, OL, STC
   • Audiology
   • https://doi.org/10.1121/1.421347

5. shock trauma center(English)

   • Emergency medicine, Post-traumatic state
   • https://doi.org…amj.2019.09.004

6. soft tissue conduction(English)

   • a recently explored mode of auditory stimulation, complementing air (AC) and bone (BC) conduction stimulation
   • AC, BC
   • Audiology, Bioengineering
   • https://doi.org…331216517734087