There are multiple definitions:

1. singular value decomposition(English)

   • an approach that is conceptually equivalent, but computationally differentiated from eigenvector decomposition
   • ART, CBFM, ICA, ICP, IRLS, MNP, MWI, PC, PCA, QQ, ROI, SDR, SLL, SW, TIKH, TSVD
   • Medical imaging, Statistics
   • https://doi.org…OC.2015.2504266
   • https://doi.org/10.1113/JP285214

2. slow virus disease(English)

   • SSPE
   • Virology

3. single vessel disease(English)

   • ACO, ACS, CAD, CFR, CFRC, CTO, CV, LAD, LCX, MVD, NSTE-ACS, RCA, RLS, TLS, WMSI
   • Coronary circulation, Pathology
   • https://doi.org…1111/echo.70390

4. structural valve degeneration(English)

   • represents a main limitation of the bioprosthetic heart valves
   • EOA, PPM, IR, PM
   • Cardiology, Biomaterials, Prosthetics
   • https://doi.org…85.2020.1858250
   • https://doi.org…06.2020.1717259

5. spontaneous vaginal delivery(English)

   • the natural, unassisted birth of a baby between 37–42 weeks gestation, without the use of forceps, vacuum, or cesarean section. It is the most common, safest, and least expensive delivery method, offering faster recovery times compared to surgical interventions
   • CS, EBL, IOL, NICU, OVD
   • Obstetrics, Military medicine, Neonatal situation
   • https://doi.org…/milmed/usaa285
   • https://doi.org…055/a-2051-2433

6. singular value decomposition(English)

   • ISTFT
   • Transform

7. small vessel disease(English)

   • ASCOD, CES, CSVD, CVA, ESUS, nsCP, TOAST
   • Microcirculation, Pathology, Cerebrovascular event
   • https://doi.org…EAHA.123.044833
   • https://www.nej…6/NEJMcp1503946

8. sternovertebral distance(English)

   • patients with obstructive sleep apnea experience repetitive pectum excavatum-associated sternal depression during sleep
   • MIRPE, OSA, PE, Pex, RHI
   • Sleep medicine, Congenital disorders, Surgery
   • https://doi.org…al.pone.0277494