Roch·es·ter (rŏchĭ-stər, -ĕs′tər)
1. A town of southeast England east-southeast of London. From an ancient Roman settlement, it grew into an important medieval commercial center.
2. A city of southeast Minnesota that is southeast of Minneapolis. The Mayo Clinic (founded in 1889) is located here.
3. A city of western New York east-northeast of Buffalo on the New York State Canal System near Lake Ontario. It was first settled c. 1812 and grew rapidly after the opening of the Erie Canal (1825).
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.