bat·ter·ing ram (bătər-ĭng)
1. A very heavy metal bar used by firefighters and law enforcement officers to break down walls and doors.
2. A heavy beam used in ancient and medieval warfare to batter down the walls and gates of a place under siege.
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.