n.
An oral drug that can terminate pregnancy by interfering with the action of progesterone and preventing the attachment of a fertilized ovum to the uterine wall.
[R(oussel) U(CLAF), a French pharmaceutical company that makes it + 486, project number.]
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
