Wordnet 3.0
ADJECTIVE (2)
1. 
 not having an (artificial) crown on a tooth; 
 used especially of molars and bicuspids; 
- Example: "uncrowned teeth badly in need of attention"2. 
 not (especially not yet) provided with a crown; 
- Example: "the uncrowned king"[syn: uncrowned, crownless]
The Collaborative International Dictionary of English v.0.48:
Uncrowned \Uncrowned\
   See crowned.
WordNet (r) 3.0 (2006):
uncrowned
    adj 1: not having an (artificial) crown on a tooth; used
           especially of molars and bicuspids; "uncrowned teeth
           badly in need of attention" [ant: crowned]
    2: not (especially not yet) provided with a crown; "the
       uncrowned king" [syn: uncrowned, crownless] [ant:
       crowned]