There are multiple definitions:

1. event-related desynchronization(English)

   • ERS, BCI, EEG

2. elastic recoil detection(English)

3. emerging research device(English)

   • CNT, CMOS, ERM, FET, MWNT, VLSI
   • Bioengineering

4. erosive reflux disease(English)

   • refers to esophagitis
   • GERD, NERD, AET, ERD, PPI, MNBI, PSPW, SAP
   • Mouth, esophagus and stomach, Pathology
   • https://doi.org…365520801908928
   • https://doi.org….1111/nmo.13116

5. Evaluation and Research Database(English)

   • AIM, HKI, ICTRP, NHD, PAHO, UNICEF
   • Data exchange, Organizations (research)
   • https://asksour…o/fr/node/67569

6. exacerbated respiratory disease(English)

   • CRSwNP, N-ERD
   • Respiratory system, Pathology, Prognosis
   • https://doi.org…0392-100X-N1614

7. effective regional deformity(English)

   • AP
   • Medical imaging, Spine (or spinal cord), Injury
   • http://pubmed.n…h.gov/20368086/