Wordnet 3.0
NOUN (1)
1. 
 used in some classification systems; 
 a suborder or superfamily nearly coextensive with suborder Tyranni; 
 Passeriformes having relatively simple vocal organs and little power of song; 
 clamatorial birds; 
[syn: Clamatores, suborder Clamatores]
WordNet (r) 3.0 (2006):
suborder Clamatores
    n 1: used in some classification systems; a suborder or
         superfamily nearly coextensive with suborder Tyranni;
         Passeriformes having relatively simple vocal organs and
         little power of song; clamatorial birds [syn: Clamatores,
         suborder Clamatores]