di·dac·tic (dī-dăktĭk) also di·dac·ti·cal (-tĭ-kəl)
1. Intended to instruct.
2. Morally instructive.
3. Inclined to teach or moralize excessively.
[Greek didaktikos, skillful in teaching, from didaktos, taught, from didaskein, didak-, to teach, educate.]
di·dacti·cism (-tĭ-sĭz′əm) n.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. 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.