There are multiple definitions:

1. Clinical Laboratory Improvement Amendments/Act(English)

   • ASSURED, FDA
   • Guidelines, Clinical chemistry

2. chemiluminescence immunoassay(English)

   • immunoassay technique where the label, i.e. the true “indicator” of the analytic reaction, is a luminescent molecule
   • ECL
   • Clinical chemistry
   • https://doi.org…3317-017-0097-2