back-fangedEnglishOxford New American Dictionaryback-fanged /ˈbakˌfäNGd, ˈbækˌfɑŋd / ▸ adjective Zoology (of a snake such as a boomslang) having the rear one or two pairs of teeth modified as fangs, with grooves to conduct the venom. Compare with front-fanged.