The story
From its binding specificity for the constant part of antibodies known as the fragment crystallizable (Fc) region.
Etymology from Wiktionary, CC BY-SA 4.0.
Fc receptor
Today it means: A protein found on the surface of certain immune and blood cells that binds to antibodies attached to infected cells or invading pathogens, enabling antibody-mediated phagocytosis or antibody-dependent cell-mediated cytotoxicity (ADCC). Full definition →