Doric order

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The oldest and simplest of the three main orders of classical Greek architecture, characterized by heavy fluted columns with plain, saucer-shaped capitals and no base.
• noun A Roman order of similar design but with the addition of a base.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The least ornate of the three styles of classical Greek architecture.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun the oldest and simplest of the Greek orders and the only one that normally has no base