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Noun passeriformes has 1 sense
Passeriformes, order Passeriformes - 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--1 is a kind of animal order
 --1 is a member of Aves, class Aves
 --1 has members:
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