proto-doric

from The Century Dictionary.

• In architecture, primitively Doric; noting any style, member, etc., as a column or capital, which exhibits the rudiments of the later-developed Grecian Doric, or is considered as having contributed to the evolution of the Grecian Doric.
• noun In architecture, primitive or rudimentary Doric. See cut under hypogeum.

from the GNU version of the Collaborative International Dictionary of English.

• adjective (Arch.) Pertaining to, or designating, architecture, in which the beginnings of the Doric style are supposed to be found.