ETAR Views 5 meanings found ETAR is the abbreviation for Endothelin Type‑A Receptor, a protein involved in vascular regulation, and serves as the ICAO code for Ramstein Air Base in Germany. Miscellaneous Eastern Traditional Archery Rendezvous Endothelin Type A Receptor Equivalent Tissue Air Ratio Academic & Science Engineering Technical Assistance Request Regional Ramstein United States Air Force Base, Germany