Any of a genus of wheel-shaped reoviruses, including one that causes gastroenteritis, especially in infants and newborn animals.
[New Latin Rotavīrus, genus name : Latinrota, wheel; see ret- in the Appendix of Indo-European roots + VIRUS.]
(click for a larger image)rotavirus
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.