emblem

Short definition from Wiktionary

Noun

1. 1
   A representative symbol, such as a trademark, a badge or logo.
2. 2
   Something that represents a larger whole.
3. 3
   Inlay; inlaid or mosaic work; something ornamental inserted in a surface.
4. 4
   A picture accompanied with a motto, a set of verses, etc. intended as a moral lesson or meditation.
5. 5
   A picture placed on the field of the escutcheon.

Verb

1. 1
   To symbolize.