Wordnet 3.0
ADJECTIVE (2)
1. 
 having no feathers; 
- Example: "a featherless biped"- Example: "the unfeathered legs of an Orpington"[syn: unfeathered, featherless]
2.  not having feathers; 
- Example: "the unfeathered brood"
The Collaborative International Dictionary of English v.0.48:
Unfeathered \Unfeathered\
   See feathered.
WordNet (r) 3.0 (2006):
unfeathered
    adj 1: having no feathers; "a featherless biped"; "the
           unfeathered legs of an Orpington" [syn: unfeathered,
           featherless] [ant: feathered]
    2: not having feathers; "the unfeathered brood"