1. Performance, as by a physician or lawyer, that falls below the professional minimum standard of care or service for a patient or client, especially when legally actionable because an injury or loss has been suffered by the patient or client.
2. An instance of such performance.
mal′prac·tition·er (-tĭshə-nər) 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.