Saucer n. : A small pan or vessel in which sauce was set on a table.

Saucer n. : A small dish, commonly deeper than a plate, in which a cup is set at table.

Saucer n. : Something resembling a saucer in shape.

Saucer n. : A flat, shallow caisson for raising sunken ships.

Saucer n. : A shallow socket for the pivot of a capstan.

Example:
Where can I find oversized/giant cup and Saucer planters in ceramic to be used as centerpieces?

Taxonomy
saucer, cup, cup and saucer, free encyclopedia, plate, Flying saucer, cylindrical cup, tea set, dishware, coffee, search, unidentified flying objects, Unsourced, sphere, distant cousin, raised center, depression, surfaces.

Defination from the web:
saucer is a small type of dishware, a plate that is specifically used with and for supporting a cup – a cylindrical cup intended for coffee or a half-sphere teacup for tea. ... The saucer also provides a convenient place to place a damp spoon, as might be used to stir the drink in ...