There are multiple definitions:

1. knee flexion angle(English)

   • ODI, PI, TPA
   • Orthopedics, Physical therapy
   • https://doi.org…-3984.2019.0048

2. kainic acid(English)

   • refers to induced status epilepticus
   • ABR, AN, CAP, CF, IHC, STB
   • Epilepsy or syncope, Synapse
   • https://doi.org…80.2004.54903.x
   • https://doi.org…2/jn.00677.2018

3. kyphotic angle(English)

   • HVC, ODI
   • Spine (or spinal cord), Surgery
   • https://doi.org…neu.2019.08.029