FZD8 (Frizzled Class Receptor 8): FZD8 is a gene that encodes a receptor for Wnt signaling proteins. It plays a critical role in embryonic development and cell signaling pathways. FZD8 is vital for processes such as cell differentiation, proliferation, and polarity. Abnormalities in FZD8 signaling are associated with developmental defects and various types of cancer.