The Collaborative International Dictionary of English v.0.48:
Credulously \Cred"u*lous*ly\, adv. With credulity. [1913 Webster]WordNet (r) 3.0 (2006):
credulously adv 1: in a credulous manner; "the children followed the teacher credulously" [syn: credulously, believingly] [ant: disbelievingly, incredulously, unbelievingly]