saucer (n.)

mid-14c., from Anglo-Latin saucerium and Old French saussier (Modern French saucière) "sauce dish," from Late Latin salsarium, neuter of salsarius "of or for salted things," from Latin salsus (see sauce (n.)). Originally a small dish or pan in which sauce is set on a table. Meaning "small, round, shallow vessel for supporting a cup and retaining any liquid which might be spilled" is attested from c. 1702.