• (n.) A massive piece of stone or wood laid immediately on the abacus of the capital of a column or pillar; -- now called architrave.
Ep'i·style noun [ Latin epistylium , Greek ...; 
In architecture, epistyle is an alternative term for an architrave.
epistyle A massive piece of stone or wood laid immediately on the abacus of the capital of a column or pillar; now called architrave (in classical architecture, the lowest section of an entablature, which comes into contact with the top of the columns). An entablature is the structure consisting of the part of a classical temple above the columns ...
the architrave of a classical building.