Added 9 October 2026 vespidae noun Categories: AnimalsObscure Words noun ! Definition from WordNet 3.1, Princeton University. More about vespidae at Wordnik → Where our words come from → An arthropod family of the order Hymenoptera including: yellow jackets; hornets; mason wasps. Related Words: sphecoideatenthredinidaemysidaecynipidaelimulidaemelolonthidaehymenopteratrypetidaesphecidae Back to today's word