A Coronet

1. A small crown worn by a noble. In the British system, they are worn only at coronations. The German equivalent is Adelskrone. Coronet - Wikipedia
2. (heraldry) A heraldic representation of a small crown, usually on a noble's coat of arms.
3. The ring of tissue between a horse's hoof and its leg.
4. The traditional lowest regular commissioned officer rank in the cavalry
5. Any of several hummingbirds in the genus Boissonneaua.
6. A species of moth, *Craniophora ligustri*.

Synonyms

(junior commissioned officer):

• ensign (infantry equivalent of the cavalry coronet)
• second lieutenant (OF-1), first NATO commissioned officer grade above OF-0 trainee officer