-facientsuff.1. Causing; bringing about: somnifacient.2. Something that causes or brings about: abortifacient.[From Latin faci?ns, facient-, present participle of facere, to do; see dh?- in Indo-European roots.]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.-facient suffix forming adjectives, suffix forming nounsindicating a state or quality: absorbefacient; rubefacient. [from Latin facient-, faci?ns, present participle of facere to do]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014-facient , a combining form meaning ?causing,? ?inducing? that specified by the initial element: parturifacient; somnifacient. [