Circlet

Part of speech: noun (n.)

1. A little circle; esp., an ornament for the person, having the form of a circle; that which encircles, as a ring, a bracelet, or a headband. Her fair locks in circlet be enrolled. Spenser.

2. A round body; an orb. Pope. Fairest of stars . . . that crown'st the smiling morn With thy bright circlet. Milton.

3. A circular piece of wood put under a dish at table. [Prov. Eng.] Halliwell.