topoisomer(redirected from Topological isomer)
Also found in: Medical.
One of a group of molecules that have the same chemical formula but different topologic structures, particularly forms of DNA that have different numbers of twists or supercoils.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.