お皿 is 皿 (plate/dish) with the polite prefix お, commonly used in everyday speech.
WORD FORMATION:
お (polite prefix) + 皿 (plate)
COUNTER:
枚 for flat objects: 一枚、二枚
COMMON VERBS:
TYPES OF DISHES:
RELATED TABLEWARE:
茶碗 (rice bowl), 箸 (chopsticks), コップ (cup)