There are multiple definitions:

1. right frontoanterior(English)

   • fetal position
   • Obstetrics

2. radio frequency ablation(English)

   • used e.g. for treatment of high-grade dysplastic nodule (in the liver)
   • MWA, TACE, BUCCT, HGDN, HCC, BCLC, AF, AT, CBA, CHA2DS2-VASc, LA, LCPV, LIPV, PV, PVI, PVR, RIPV
   • Cardiology, Bioengineering, Oncology, Therapeutic approaches, Liver disease
   • https://doi.org….1002/hep.24589
   • https://doi.org…876-020-01235-w
   • https://doi.org…90/jcdd11020057

3. Request for Applications(English)

   • typically one-time solicitations for grant applications addressing a well-defined research topic
   • NIH, NIMHD, FOA
   • Organizations (research)

4. resonance frequency analysis(English)

   • has been developed to quantitatively estimate ISQ
   • ISQ
   • Dentistry
   • https://doi.org…bcr.2020.07.004