sau ‧ cer /ˈsɔːsə $ ˈsɒːsər/ BrE AmE noun [countable]
[ Date: 1300-1400 ; Language: Old French ; Origin: saussier 'plate for sauce' , from sausse , sauce ; ⇨ ↑ sauce ]
a small round plate that curves up at the edges, that you put a cup on:
a china cup and saucer
⇨ ↑ flying saucer