Source : Webster's Revised Unabridged Dictionary (1913)

Featherless \Feath"er*less\, a.
   Destitute of feathers.

Source : WordNet®

featherless
     adj : having no feathers; "a featherless biped"; "the unfeathered
           legs of an Orpington" [syn: {unfeathered}] [ant: {feathered}]