from The American Heritage® Dictionary of the English Language, 4th Edition
- suffix Causing; bringing about: somnifacient.
- suffix Something that causes or brings about: abortifacient.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- suffix causing the specified condition
- suffix something that causes a specified condition
From Latin faciēns, facient-, present participle of facere, to do; see dhē- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)