Definition of rosettes:
(n) :
(architecture) An element or ornament resembling a rose, especially on a wall or other surface, mostly for decorative purposes.
(n) :
(architecture, now uncommon) A rose window.
(n) :
An imitation of a rose made of ribbon or other material, worn as an ornament or symbol, especially:
(n) :
A rose-shaped arrangement awarded as a prize won in a competition (e.g., a horse show).
(n) :
A rose-shaped badge of support or membership (e.g., of a political party).
(n) :
A small rose-shaped ornament worn as a symbol of an honorific order or military decoration, typically presented with a medal or in place of a medal (e.g., as a lapel button).