n.
A drug, C20H23NO4, used as an antagonist to narcotic drugs.
[Blend of NAL(O)XONE and tre- (probably alteration of TRI-, after the three carbon atoms in the propyl group that distinguishes it from naloxone, of which it is a congener).]
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.