- any one of numerous sawflies regarding the family members Siricidae, the female which features a lengthy stout ovipositor.
- The timber wasp.
- anyone of family members (Uroceridæ) of large hymenopterous pests, allied towards the sawflies. The larvæ bore inside timber of woods. So named from long, stout ovipositors of the females.
- A terebrant hymenopterous insect of the family Uroceridæ; a tailed wasp: so called from the prominent horn at the end of the abdomen of the male. It is related to the saw-fly. See Sirex and Urocerus.
Sentence for "horntail"
Urban Dictionary for "horntail"