1. Consisting of ten parts or members.
2. Ten times as much in size, strength, number, or amount.
A tenfold amount or number.
intr. & tr.v. dec·u·pled, dec·u·pling, dec·u·ples
To multiply or be multiplied by ten.
[Middle English, from Old French, from Late Latin decuplus : Latin decem, ten; see dek in the Appendix of Indo-European roots + Latin -plus, -fold; see pel-2 in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 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.