triglyph

noun

tri·​glyph ˈtrī-ˌglif 

: a slightly projecting rectangular tablet in a Doric frieze with two vertical channels of V section and two corresponding chamfers or half channels on the vertical sides

triglyphic

trī-ˈgli-fik 

adjective

or triglyphical

trī-ˈgli-fi-kəl 

Word History

Etymology

Latin triglyphus, from Greek triglyphos, from tri- + glyphein to carve — more at cleave

First Known Use

1563, in the meaning defined above