cymatium

noun

cy·​ma·​tium sī-ˈmā-sh(ē-)əm 

plural cymatia sī-ˈmā-sh(ē-)ə 

: a crowning molding in classic architecture

especially : cyma

Word History

Etymology

Latin, from Greek kymation, diminutive of kymat-, kyma

First Known Use

1563, in the meaning defined above