cyc·lic (sĭklĭk, sīklĭk) or cyc·li·cal (sĭklĭ-kəl, sīklĭ-kəl)
a. Of, relating to, or characterized by cycles: a cyclic pattern of weather changes.
b. Recurring or moving in cycles: cyclical history.
2. Chemistry Of or relating to compounds having atoms arranged in a ring or closed-chain structure.
a. Having parts arranged in a whorl.
b. Forming a whorl.
cy′cli·cali·ty (sĭk′lə-kălĭ-tē, sī′klə-) n.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 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.