v. frac·tion·at·ed, frac·tion·at·ing, frac·tion·ates
1. To divide or separate into parts; break up: "In the post-Watergate era, power has been fractionated on Capitol Hill" (Evan Thomas).
2. To separate (a chemical mixture) into components, as by distillation or crystallization.
1. To divide or separate into parts: "Languages have an extraordinary capacity to fractionate into mutually unintelligible dialects" (Robin Dunbar).
2. To undergo chemical separation, as by distillation or crystallization.
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.