There are multiple definitions:

1. alternative reading frame(English)

   • a protein
   • INK4A

2. acute renal failure(English)

   • CRF
   • Nephrology

3. acute respiratory failure(English)

   • ETI, NPPV, HM, ICU
   • Pulmonology

4. auxin response factor(English)

5. acoustic radiation force(English)

   • ARFI, SUSI, UEI

6. adaptation recovery function(English)

   • neural adaptation recovery processes at the auditory nerve demonstrate substantial variations among human cochlear implant users. The recovery pattern can be nonmonotonic with up to three phases
   • ARR, MPI, CI
   • Adaptation & plasticity
   • https://doi.org…000000000001198