col·i·se·um also col·os·se·um (kŏl′ĭ-sēəm)
A large amphitheater for public sports events, entertainment, or assemblies.
[Medieval Latin Colisēum, an amphitheater in Rome, Italy, variant of Latin Colossēum, from neuter of colossēus, gigantic, from colossus, huge statue; see COLOSSUS.]
(click for a larger image)coliseum
arena of the Colosseum
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.