There are multiple definitions:
emergency operations plan(English)
endogenous opioid peptide(English)
- transmitter and part of the endogenous opioid system. Naturally occurring peptides are synthesized from protein precursor molecules and include endorphins, dynorphins, and enkephalins. Among other locations, they are present in the central and peripheral nervous systems, cardiovascular and gastrointestinal systems, and immune cells
- EOS
- https://doi.org…-2454-5.50019-9