in antis

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

• adjective Having a recessed portico with a row of columns between the antae, as in some Greek temples.
• adjective Of or being the portico or columns in such an arrangement.

from The Century Dictionary.

• In classical arch., between antæ or pilasters: a phrase noting porticoes or buildings without a peristyle, of which the side walls are prolonged beyond the front, forming antæ, which with columns between them support an entablature. See anta.

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

• (Arch.) Between antæ; -- said of a portico in classical style, where columns are set between two antæ, forming the angles of the building. See anta.

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

• adverb architecture Between antae; said of a portico in classical style, where columns are set between two antae, forming the angles of the building.