a·vi·on·ics (ā′vē-ŏnĭks, ăv′ē-)
1. (used with a sing. verb) The science and technology of electronics and the development of electronic devices as applied to aeronautics and astronautics: Avionics has become even more important with the development of the space program.
2. (used with a pl. verb) The electronic systems, equipment, and other devices so developed: The avionics on this spacecraft represent a new generation of sophistication.
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.