There are multiple definitions:

1. septal to lateral peak strain ratio(English)

   • IVMD, LBBB, LSPD, SF, SRS, SSI
   • Cardiology, Ratio-based metric
   • https://doi.org…cmg.2021.02.019

2. speech and language [milestones](English)

   • refers to verbal level achieved by a deaf child
   • CI, DSB, DSF, SMD, SRD, STM, WM
   • Audiology, Pediatrics, Education
   • https://doi.org…b013e318269ce50