There are multiple definitions:

1. sodium/hydrogen [proton] exchanger(English)

   • NBC, NCCT
   • Sodium

2. nonhomologous end-joining(English)

   • DNA
   • Genetics

3. Nordic hamstring exercise(English)

   • heterogeneous effects on the biceps femoris fascicle length based on ultrasound assessment and extrapolation methods
   • BF, FL, LOE, MLE, BLC, EMG, NHE, USLDL, SM, ST
   • Exercise & Training, Ultrasound
   • https://doi.org…al.pone.0259821