o·rac·u·lar (ô-răkyə-lər, ō-răk-)
1. Of, relating to, or being an oracle.
2. Resembling or characteristic of an oracle:
a. Solemnly prophetic.
b. Enigmatic; obscure.
[From Latin ōrāculum, oracle, from ōrāre, to speak.]
o·rac′u·lari·ty (-lărĭ-tē) n.
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.