pa·te·ra 
(pätə-rə, pătə-)
(pätə-rə, pătə-)n. pl. pa·te·ras also pa·te·rae (-rē)
1. A shallow bowl or dish, especially one used ceremonially by the ancient Romans in pouring libations.
2. A shallow crater on the surface of a solar system body, having an irregular or scalloped rim, caused either by past volcanic activity or by the impact of a much smaller solar system body.
[Latin, perhaps from patina, shallow dish (influenced by crātēra, vessel for mixing wine with water); see PATEN.]
pateraApollinaris Patera on Mars