pharmaco-
pref. Drug; medicine: pharmacognosy.
[Greek, from pharmakon, poison, drug.]
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.
pharmaco-
combining form (Pharmacology) indicating drugs: pharmacology; pharmacopoeia.
[from Greek pharmakon drug, potion]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
pharmaco-
a combining form meaning “drug”: pharmacology.
[comb. form representing Greek phármakon drug]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.