To divide or separate into parts; break up: "In the post-Watergate era, power has been fractionated on Capitol Hill” ( Evan Thomas).
To separate (a chemical compound) into components, as by distillation or crystallization.
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.