distyle

from The Century Dictionary.

• Noting a portico of two columns: applied rather to a portico with two columns in antis than to a plain two-columned porch. See cut under anta.
• noun A portico of two columns.

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

• adjective (Arch.) Having two columns in front; -- said of a temple, portico, or the like.
• adjective having columns between two antæ. See Anta.

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

• adjective architecture Having two columns in front; said of a temple, portico, etc.