9 Grammatical Pitfalls
1620s, from French facette (12c., Old French facete), diminutive of face (see face (n.)). The diamond-cutting sense is the original one. Related: Faceted; facets.
facet fac·et (fās'ĭt)n.
A small smooth area on a bone or other firm structure.
A worn spot on a tooth, produced by chewing or grinding.