名詞 cyma:

1. (architecture) a molding for a cornice; in profile it is shaped like and S (partly concave and partly convex)
   同義詞：cymatium

cy.ma

n.Architecture （名詞）【建筑學】
A molding for a cornice, having a partly concave and partly convex curve in profile, used especially in classical architecture.Also called cymatium
反曲線飾：縱斷面部分為凹線，部分為凸形的檐口的線腳，尤用在古典建筑中也作 cymatium

來源：
Greek kuma [wave, cyma]
希臘語 kuma [曲線，反曲線]
from kuein [to swell] * see keu…-
源自 kuein [使隆起] *參見 keu…-