Having a double row of columns on all sides, as certain Greek temples.
[From Greek dipteros, temple with a double peristyle : di-, di- + pteron, feather, wing; see pet- in the Appendix of Indo-European roots.]
(click for a larger image)dipteral
after a plan of the
Temple of Apollo
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.