sauceplate
/ˈsɔːsplæt/Definitions
1. noun
a plate, typically larger than a dinner plate, used for serving sauces, relishes, or other condiments
“She placed the sauceplate on the table alongside the main course.”
2. noun
a large plate used as a base for a centerpiece or decorative item
“The dinner table was adorned with a beautiful sauceplate as the centerpiece.”