orniˈthivorous,a.rare. [irreg.f.Gr. ὀρνῑθ- bird- + L. -vor-us: see -vorous.] Bird-devouring. 1857in Mayne Expos.Lex.1884J. E. Taylor Sagacity of Plants 276 The larger and peculiarly-constructed nepenthes, therefore, may be ornithivorous as well as insectivorous.