There are multiple definitions:

1. rapid eye movement(English)

   • RWL, UNREM, NREM, SWS, AASM, MSA, PD, PSG, RWA, RWR, VPSG
   • Sleep medicine, Diagnostics
   • https://doi.org…eep.2023.08.022

2. röntgen equivalent man(English)

   • sievert
   • Radiotherapy /radiation

3. RAS exchanger motif(English)

   • RAS
   • Cell biology
   • https://doi.org…0/cells10071831

4. Risk Evaluation Mitigation(English)

   • an FDA drug safety program for medications with serious risks, ensuring benefits outweigh risks through specific tools like patient education, provider training, or restricted distribution (e.g., certified facilities), aiming to reinforce safe use behaviors and manage severe side effects
   • ARIA, FDA, GABA, MDD, MDMA, NDA, NMDA, PTSD, SGA
   • Pharmacology / pharmaceutics, Safety and health, Organizations (governmental), Education
   • https://doi.org/10.64719/pb.4493