There are multiple definitions:

1. zeta-chain-associated protein(English)

   • member of the protein-tyrosine kinase family
   • RAG, CLL, SLE
   • Immunology
   • https://en.wiki….org/wiki/ZAP70

2. zoster-associated pain(English)

   • HZ, PHN, ZBPI
   • Virology, Pain, Neuropathy
   • https://doi.org…390/jpm13091286

3. impedance (Z) amplitude profile(English)

   • e.g. a sinusoidal stimulus
   • CPP, GABA, GHK, NMDA, RBC
   • Electrophysiology, Neurons, Optics and vision
   • https://doi.org/10.1113/JP288673