Wyvern folklore is rarely fire-breathing like the four-legged dragon. Sometimes modern fantasy book and media authors have wyverns that are frost-breathing or poison-breathing instead of fire-breathing. The current spelling "wyvern" is not attested before the seventeenth century as "winged two-footed dragon". According to the Oxford English Dictionary, it is an alteration of Middle English "wyver" (attested thirteenth century), from Anglo-French "wivre" (cf. French "guivre" and "vouivre"), which originate from Latin "vīpera", meaning "viper", "adder", or "asp". Conversely, medievalist William Sayers proposes a more complex origin for the term. He notes that the Anglo-French "guivre" and its Middle English derivative ceased to
German heraldry German heraldry German heraldry is the tradition and style of heraldic achievements in Germany and the Holy Roman Empire, including national and civic arms, noble and burgher arms, ecclesiastical heraldry, heraldic displays and heraldic descriptions. German heraldic style is one of the four major broad traditions within European heraldry and stands in contrast to Gallo-British, Latin and Eastern heraldry, and strongly influenced the styles and customs of heraldry in the Nordic countries, which developed comparatively late. Together, German and Nordic heraldry are often referred to as German-Nordic heraldry. The German heraldic tradition is noted for its scant use of heraldic