There are multiple definitions:

1. extensor carpi radialis(Latin)

   • ECRL, ECU, FCR, BIC, CCI, EMG, FMA, TRI, ICF, MEP, PCA, QQ, RMT, SEM, SICF, SICI, SVD, TMS, TS, ACC, CSE, M1, PMd, RoR, SMA
   • Anatomy, Musculoskeletal system, Rehabilitation, Electrophysiology, Statistics
   • https://doi.org…kin.2008.04.002
   • https://doi.org/10.1113/JP285214
   • https://doi.org…nhum.2016.00204

2. effective compression ratio(English)

   • measurement of the quality of thorax compression during CPR, representing the combined relevant parameters of compression to provide a rapid assessment of the quality of chest compression
   • ALS, BLS, CPR, NFT, EC
   • Emergency medicine, Ratio-based metric
   • https://doi.org…ion.2012.10.016

3. ear-canal reflectance(English)

   • refers to measurement of middle ear function
   • CR, VU
   • Audiology, Auditory system
   • https://doi.org…b013e31822ccb76

4. Emotional Contagion Resistant(English)

   • low empathy-like behavior associates with impaired sociability, emotional memory, physiological stress reactivity and variations in neurobiological regulations
   • ECP
   • Stress (test), Behavior(al science), Emotional aspects
   • https://doi.org…al.pone.0188907

5. environmental context and resource(English)

   • refers to perceptions of vaccine side effects
   • BACon, BCW, TDF
   • Psychology, Vaccination, Adverse effect
   • https://doi.org…46.2021.1957104