Added 9 October 2026 ursidae noun Categories: AnimalsObscure Words noun ! Definition from WordNet 3.1, Princeton University. More about ursidae at Wordnik → Where our words come from → Bears and extinct related forms. Related Words: giraffidaelorisidaechinchillidaebathyergidaecaviidaehystricidaeerethizontidaehipposideridaelemuridaemolossidae Back to today's word