anthemion
noun
an·the·mi·on an-ˈthē-mē-ən 
plural anthemia an-ˈthē-mē-ə or anthemions
or anthemions : a flat ornament of floral form (as in relief sculpture or in painting)
Word History
Etymology
borrowed from Greek anthémion "floral pattern on an Ionic column," diminutive of ánthemon "blossom, flower," from ánthos "flower" + -emon, noun suffix of uncertain sense (also in árgemon "white spot on the eye," from argós "bright, white") — more at antho-
First Known Use
1865, in the meaning defined above