tu·to·ri·al (t-tôrē-əl, ty-)
Of or relating to tutors or a tutor.
Something that provides special, often individual instruction, especially:
a. A book or class that provides instruction in a particular area.
b. Computers A program that provides instruction for the use of a system or of software.
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.