| passeriformes | (n) largest order of birds comprising about half the known species; rooks; finches; sparrows; tits; warblers; robins; wrens; swallows; etc.; the four suborders are Eurylaimi and Tyranni and Menurae and Oscines or Passeres, Syn. order Passeriformes |
| Passeriform | a. (Zool.) Like or belonging to the |
| Passeriformes | prop. n. The largest order of birds comprising about half the known species: rooks; finches; sparrows; tits; warblers; robins; wrens; swallows; etc.; in four suborders: |