Greek gods have left their mark all over language (and symbols). The Greek god Asclepius was associated with the healing arts and all things medicinal, and he carried a staff entwined with a snake (the Rod of Asclepius). This staff is still used in medical-related symbols and logos. The adjective “Aesculapian” (capitalized because it’s an eponym), is used probably less commonly than the symbol, but it refers to anything related to medicine or physicians.