PATERA
Etymology
Noun
patera (plural paterae)
A broad, shallow dish used for drinking, primarily in ritual contexts such as libations.
in architecture, a circular ornament, resembling a dish, often worked in relief on friezes etc.
Source: Wiktionary
Pat"e*ra, n.; pl. Pateræ(. Etym: [ L., fr. patere to lie open.]
1. A saucerlike vessel of earthenware or metal, used by the Greeks
and Romans in libations and sacrificies.
2. (Arch.)
Definition: A circular ornament, resembling a dish, often worked in relief
on friezes, and the like.
Source: Webster’s Unabridged Dictionary 1913 Edition