patera noun. ['pat(ǝ)rǝ] Pl. -rae [-ri:]. M17.
[Latin, from patere be open.]
1. Roman Antiquities. A broad shallow dish used esp. for pouring libations. M17.

2. Architecture. An ornament resembling a shallow dish; any flat round ornament in bas-relief. L18.

3. Astronomy. A broad, shallow, bowl-shaped feature on a planet's surface. L20.

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