1. Of, relating to, or dealing with ethics: an ethical treatise.
2. Being in accordance with the accepted principles of right and wrong that govern the conduct of a profession: an ethical act. See Synonyms at moral.
3. Relating to or being a drug dispensed solely on the prescription of a physician.
ethi·cal·ness, eth′i·cali·ty (-kălĭ-tē) n.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 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.