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
Vauxhall Wyvern in 1946, using pre-war tooling. The 10 h.p engine was used, but this soon replaced by a 12 h.p. unit. The L Series Wyvern was produced from 1948 to 1951. It was offered with an Australian developed Sedan body, an Australian "Caleche" Tourer body or with the English Sedan body. The Australian Sedan differed from its English counterpart in having a longer passenger cabin, a more rounded boot and an additional side window behind the rear doors. Australian vehicles carried the model code LBX. The E Series Wyvern was produced from 1952 to 1957. In addition to building a 4-door