fantasy prefix

fantasy prefix

n.
An arbitrarily or whimsically formed prefix (sometimes alluding to chemical composition or the circumstances of development) used as a distinguishing element in the coining of a pharmaceutical's generic name.
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.