n. pl. cen·tu·ries
a. A period of 100 years.
b. Each of the successive periods of 100 years before or since the advent of the Christian era.
a. A unit of the Roman army originally consisting of 100 men.
b. One of the 193 electoral divisions of the Roman people.
3. A group of 100 things.
[Latin centuria, a group of a hundred, from centum, hundred; see dek in the Appendix of Indo-European roots.]
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.