There are multiple definitions:

1. set top box(English)

   • a device that allows users to view video content from specific internet video providers via the internet or digital satellite
   • Data exchange
   • https://en.wiki…iki/Set-top_box

2. short tone bursts(English)

   • ABR, AN, CAP, CF, IHC
   • Audiology
   • https://doi.org…2/jn.00677.2018

3. syncytiotrophoblast(English)

   • EPI, ESC, EVT, ExE, GlyT, JZ, LINE, PE, PGC, PS, SA, SINE, SpT, TGC, TDG, TE, TSC, TTD, vCTB , XEN, All, BER, CCC, CH, CTB, Dec, EC, EPC
   • Embryology /reproduction
   • https://doi.org…srev.00001.2023