There are multiple definitions:

1. Fellow American College of Surgeons(English)

   • Surgery, Organizations (clinical)

2. fluorescence-activated/assisted cell sorter(English)

   • see flow cytometry
   • Fluorescence

3. Facial Action Coding System(English)

   • refers to evaluation of facial expressions and subsequent classification of those expressions into discrete categories of basic emotions (happy, sad, disgusted, surprised, angry, scared, and neutral) on a scale from 0 (not expressed) to 1 (fully expressed)
   • AAM, AU, EMG, AFEA
   • Scoring systems/scales, Behavior(al science), Cognitive function, Emotional aspects, Psychology, Classification
   • https://doi.org…psyg.2020.00920
   • http://www.noldus.com
   • https://doi.org…OC.2023.3257542