There are multiple definitions:

1. enzyme unit(English)

2. European Union(English)

   • EWTD, MEP, EUDAMED
   • Organizations (documentation)

3. endotoxin unit(English)

   • endotoxins are known to activate complement, the kinin system, leukocytes, platelets and endothelial cells. They are the “enemy” of both in vitro and in vivo study of blood–material interactions. Purified endotoxins are much more potent than environmental endotoxins
   • LPS
   • Bacteriology, Environment
   • https://doi.org…45154-1.50025-3