The Collaborative International Dictionary of English v.0.48:
Featherless \Feath"er*less\, a. Destitute of feathers. [1913 Webster]WordNet (r) 3.0 (2006):
featherless adj 1: having no feathers; "a featherless biped"; "the unfeathered legs of an Orpington" [syn: unfeathered, featherless] [ant: feathered]