or·i·fice (ôr??-f?s, ?r?-)n. An opening, especially to a cavity or passage of the body; a mouth or vent.[Middle English, from Old French, from Late Latin ?rificium : Latin ?s, ?r-, mouth; see ?s- in Indo-European roots + Latin -ficium, a making, doing (from facere, to make; see dh?- in Indo-European roots).]or?i·fi?cial (-f?sh??l) adj.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.orifice (??r?f?s) nchiefly Technical an opening or mouth into a cavity; vent; aperture[C16: via French from Late Latin ?rificium, from Latin ?s mouth + facere to make]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014or?i?fice (??r ? f?s, ??r-) n. an opening or aperture, as of a tube or pipe; a mouthlike opening or hole; mouth; vent. [1535?45;