fa·ci·es (f??sh?-?z?, -sh?z)n. pl. facies 1. Biology The general aspect or outward appearance, as of a given growth of flora.2. Medicine The appearance or expression of the face, especially when typical of a certain disorder or disease.3. Geology A rock or stratified body distinguished from others by its appearance or composition.[Latin faci?s; 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.facies (?fe????i?z) n, pl -cies1. (Biology) the general form and appearance of an individual or a group of plants or animals2. (Geological Science) the characteristics of a rock or series of rocks reflecting their appearance, composition, and conditions of formation3. (Medicine) med the general facial expression of a patient, esp when typical of a specific disease or disorder. See Hippocratic facies[C17: from Latin: appearance, face]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014fa?ci?es (?fe? ?i?iz, -?iz) n., pl. fa?ci?es. 1. general appearance, as of an animal or vegetable group. 2. the appearance and characteristics of a rock formation, esp. as differentiated from contiguous deposits. 3. a facial expression characteristic of a pathological condition. 4. a distinctive phase of a prehistoric cultural tradition. [1680?1690;