WordWeb Online

1. (dentistry) not having an (artificial) crown on a tooth; used especially of molars and bicuspids
   "uncrowned teeth badly in need of attention"
    
2. Not (especially not yet) provided with a crown
   "the uncrowned king";
   - crownless

1. Deprive of the monarchy or a ruling position

See also: quasi-royal, uncapped

Antonym: crowned